12 Technological Advancements of World War I

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Erik Sass has been covering the events leading up to World War I exactly 100 years after they happened. But today he's here to discuss some inventions of The Great War.

1. Tanks

In 1914, the “war of movement” expected by most European generals settled down into an unexpected, and seemingly unwinnable, war of trenches. With machine guns reinforcing massed rifle fire from the defending trenches, attackers were mowed down by the thousands before they could even get to the other side of “no-man’s-land.”

A solution presented itself, however, in the form of the automobile, which took the world by storm after 1900. Powered by a small internal combustion engine burning diesel or gas, a heavily-armored vehicle could advance even in the face of overwhelming small arms fire. Add some serious guns and replace the wheels with armored treads to handle rough terrain, and the tank was born.

The first tank, the British Mark I, was designed in 1915 and first saw combat at the Somme in September 1916. The French soon followed suit with the Renault FT, which established the classic tank look (turret on top). Despite their later prowess in tank combat in WWII, the Germans never got around to large-scale tank production in WWI, although they did produce 21 tanks in the unwieldy A7V model.

2. Flamethrowers

Although the Byzantines and Chinese used weapons that hurled flaming material in the medieval period, the first design for a modern flamethrower was submitted to the German Army by Richard Fiedler in 1901, and the devices were tested by the Germans with an experimental detachment in 1911. Their true potential was only realized during trench warfare, however. After a massed assault on enemy lines, it wasn’t uncommon for enemy soldiers to hole up in bunkers and dugouts hollowed into the side of the trenches. Unlike grenades, flamethrowers could “neutralize” (i.e. burn alive) enemy soldiers in these confined spaces without inflicting structural damage (the bunkers might come in handy for the new residents). The flamethrower was first used by German troops near Verdun in February 1915.

3. Poison Gas


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Poison gas was used by both sides with devastating results (well, sometimes) during the Great War. The Germans pioneered the large-scale use of chemical weapons with a gas attack on Russian positions on January 31, 1915, during the Battle of Bolimov, but low temperatures froze the poison (xylyl bromide) in the shells. The first successful use of chemical weapons occurred on April 22, 1915, near Ypres, when the Germans sprayed chlorine gas from large cylinders towards trenches held by French colonial troops. The defenders fled, but typically for the First World War, this didn’t yield a decisive result: the Germans were slow to follow up with infantry attacks, the gas dissipated, and the Allied defenses were restored. Before long, of course, the Allies were using poison gas too, and over the course of the war both sides resorted to increasingly insidious compounds to beat gas masks, another new invention; thus the overall result was a huge increase in misery for not much change in the strategic situation (a recurring theme of the war).

4. Tracer Bullets


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While the Great War involved a lot of futile activity, fighting at night was especially unproductive because there was no way to see where you were shooting. Night combat was made somewhat easier by the British invention of tracer bullets—rounds which emitted small amounts of flammable material that left a phosphorescent trail. The first attempt, in 1915, wasn’t actually that useful, as the trail was “erratic” and limited to 100 meters, but the second tracer model developed in 1916, the .303 SPG Mark VIIG, emitted a regular bright green-white trail and was a real hit (get it?). Its popularity was due in part to an unexpected side-benefit: the flammable agent could ignite hydrogen, which made it perfect for “balloon-busting” the German zeppelins then terrorizing England.

5. Interrupter Gear


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Airplanes had been around for just a decade when WWI started, and while they had obvious potential for combat applications as an aerial platform for bombs and machine guns, it wasn’t quite clear how the latter would work, since the propeller blades got in the way. In the first attempt, the U.S. Army basically tied the gun to the plane (pointing towards the ground) with a leather strap, and it was operated by a gunner who sat beside the pilot. This was not ideal for aerial combat and inconvenient because it required two airmen to operate. Another solution was mounting the gun well above the pilot, so the bullets cleared the propeller blades, but this made it hard to aim. After the Swiss engineer Franz Schneider patented his idea for an interrupter gear in 1913, a finished version was presented by Dutch designer Anthony Fokker, whose “synchronizer,” centered on a cam attached to the propeller shaft, allowed a machine gun to fire between the blades of a spinning propeller. The Germans adopted Fokker’s invention in May 1915, and the Allies soon produced their own versions. Schneider later sued Fokker for patent infringement.

6. Air traffic control

In the first days of flight, once a plane left the ground the pilot was pretty much isolated from the terrestrial world, unable to receive any information aside from obvious signals using flags or lamps. This changed thanks to the efforts of the U.S. Army, which installed the first operational two-way radios in planes during the Great War (but prior to U.S. involvement). Development began in 1915 at San Diego, and by 1916 technicians could send a radio telegraph over a distance of 140 miles; radio telegraph messages were also exchanged between planes in flight. Finally, in 1917, for the first time a human voice was transmitted by radio from a plane in flight to an operator on the ground.

7. Depth Charges


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The German U-boat campaign against Allied shipping sank millions of tons of cargo and killed tens of thousands of sailors and civilians, forcing the Allies to figure out a way to combat the submarine menace. The solution was the depth charge, basically an underwater bomb that could be lobbed from the deck of a ship using a catapult or chute. Depth charges were set to go off at a certain depth by a hydrostatic pistol that measured water pressure, insuring the depth charge wouldn’t damage surface vessels, including the launch ship. After the idea was sketched out in 1913, the first practical depth charge, the Type D, was produced by the Royal Navy’s Torpedo and Mine School in January 1916. The first German U-boat sunk by depth charge was the U-68, destroyed on March 22, 1916.

8. Hydrophones

Of course it was a big help if you could actually locate the U-boat using sound waves, which required a microphone that could work underwater, or hydrophone. The first hydrophone was invented by 1914 by Reginald Fessenden, a Canadian inventor who actually started working on the idea as a way to locate icebergs following the Titanic disaster; however, it was of limited use because it couldn’t tell the direction of an underwater object, only the distance. The hydrophone was further improved by the Frenchman Paul Langevin and Russian Constantin Chilowsky, who invented an ultrasound transducer relying on piezoelectricity, or the electric charge held in certain minerals: a thin layer of quartz held between two metal plates responded to tiny changes in water pressure resulting from sound waves, allowing the user to determine both the distance and direction of an underwater object. The hydrophone claimed its first U-boat victim in April 1916. A later version perfected by the Americans could detect U-boats up to 25 miles away.

9. Aircraft Carriers


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The first time an airplane was launched from a moving ship was in May 1912, when commander Charles Rumney Samson piloted a Short S.27 pontoon biplane from a ramp on the deck of the HMS Hibernia in Weymouth Bay. However, the Hibernia wasn’t a true aircraft carrier, since planes couldn’t land on its deck; they had to set down on the water and then be retrieved, slowing the whole process considerably. The first real aircraft carrier was the HMS Furious, which began life as a 786-foot-long battle cruiser equipped with two massive 18-inch guns—until British naval designers figured out that these guns were so large they might shake the ship to pieces. Looking for another use for the vessel, they built a long platform capable of both launching and landing airplanes. To make more room for takeoffs and landings, the airplanes were stored in hangars under the runway, as they still are in modern aircraft carriers. Squadron Commander Edward Dunning became the first person to land a plane on a moving ship when he landed a Sopwith Pup on the Furious on August 2, 1917.

10. Pilotless Drones

The first pilotless drone was developed for the U.S. Navy in 1916 and 1917 by two inventors, Elmer Sperry and Peter Hewitt, who originally designed it as an unmanned aerial bomb—essentially a prototype cruise missile. Measuring just 18.5 feet across, with a 12-horsepower motor, the Hewitt-Sperry Automatic Aircraft weighed 175 pounds and was stabilized and directed (“piloted” is too generous) with gyroscopes and a barometer to determine altitude. The first unmanned flight in history occurred on Long Island on March 6, 1918. In the end, the targeting technique—point and fly—was too imprecise for it to be useful against ships during the war. Further development, by attempting to integrate remote radio control, continued for several years after the war, until the Navy lost interest in 1925.

11. Mobile X-Ray Machines

With millions of soldiers suffering grievous, life-threatening injuries, there was obviously a huge need during the Great War for the new wonder weapon of medical diagnostics, the X-ray—but these required very large machines that were both too bulky and too delicate to move. Enter Marie Curie, who set to work creating mobile X-ray stations for the French military immediately after the outbreak of war; by October 1914, she had installed X-ray machines in several cars and small trucks which toured smaller surgical stations at the front. By the end of the war there were 18 of these “radiologic cars” or “Little Curies” in operation. African-American inventor Frederick Jones developed an even smaller portable X-ray machine in 1919 (Jones also invented refrigeration units, air conditioning units, and the self-starting gasoline lawnmower).

12. Sanitary Napkins

Women traditionally improvised all kinds of disposable or washable undergarments to deal with their monthly period, all the way back to softened papyrus in ancient Egypt. But the modern sanitary napkin as we know it was made possible by the introduction of new cellulose bandage material during the First World War; it wasn’t long before French nurses figured out that clean, absorbent cellulose bandages were far superior to any predecessors. British and American nurses picked up on the habit, and corporate America wasn’t far behind: In 1920, Kimberly-Clark introduced the first commercial sanitary napkin, Kotex (that’s “cotton” + “texture”). But it was rough going at first, as no publications would carry advertisements for such a product. It wasn’t until 1926 that Montgomery Ward broke the barrier, carrying Kotex napkins in its popular catalogue.

12 Surprising Facts About Red Dawn

Metro-Goldwyn-Mayer Studios Inc.
Metro-Goldwyn-Mayer Studios Inc.

On August 10, 1984, Red Dawn stormed into theaters. The Cold War-era film envisioned a WWIII-like scenario of what it would look like if Communist Soviets and Cubans invaded a small Colorado town, and what might happen if a group of teenagers fought back with heavy artillery. The cast included then-unknowns Jennifer Grey, Lea Thompson, and Charlie Sheen, plus rising stars Patrick Swayze and C. Thomas Howell (who had co-starred in 1983’s The Outsiders), plus veteran actors Powers Boothe and Harry Dean “Avenge Me!” Stanton.

John Milius, who had been nominated for an Oscar for co-writing Apocalypse Now and who had co-written and directed 1982’s Conan the Barbarian, directed Red Dawn from a script—originally named Ten Soldiers—written by future Waterworld director Kevin Reynolds. With a budget of $17 million, the film—the first to be distributed with the newly formed PG-13 rating—grossed $38.3 million. Here are some things you might not know about Red Dawn.

1. John Milius rewrote the script of Red Dawn.

Kevin Reynolds wrote Red Dawn while still a student at USC film school. MGM optioned the script and asked Milius to direct it. “I brought the writer in and said, ‘This isn’t going to be easy for you to take because, you know, you’re kind of full of yourself, but I’m going to take this and I’m going to make it into my movie, and you’re just going to have to sit back and watch, and it may not be too pleasant,” Milius told Creative Screenwriting. “My advice is to take the money you have and spend it on a young girl. Enjoy getting laid and write another script. Because this isn’t going to be fun to watch.’”

Milius said Reynolds’s script was similar to Lord of the Flies. “I kept some of that, but my script was about the resistance. And my script was tinged by the time, too. We made it really outrageous, infinitely more outrageous than his vision. And to this day, it holds up, because people ask, ‘What’s that movie about?’ And I say that movie’s not about the Russians; it’s about the federal government.”

2. Milus had a very unique way of auditioning actresses for the film.

Red Dawn co-casting director Jane Jenkins explained that Milius would ask each auditioning actress “What would happen if you were in the wilderness and you were starving? Could you kill a bunny?” “And he’d always say a bunny, not a rabbit,” Jenkins said. “And he’d say, ‘Could you kill a bunny and skin it, and eat it?’ And the girls were horrified at that suggestion, and needless to say didn’t go any further. The girls who said, ‘Well, if it were life or death …’ got to go on and read for the parts they eventually were going to play.”

3. Red Dawn was described as "the most violent movie ever made."

After the movie was released in 1984, The National Coalition on Television Violence deemed Red Dawn “the most violent movie ever made.” They said it contained 134 acts of violence an hour, and they rated it X. “This summer’s releases are the most violent in the history of the industry, averaging 28.5 violent acts an hour,” the Coalition said. They also gave X ratings to Gremlins and Indiana Jones and the Temple of Doom.

4. Milius put Patrick Swayze in charge of Red Dawn's cast.

Charlie Sheen, Jennifer Grey, Patrick Swayze, Lea Thompson, C. Thomas Howell, Darren Dalton, Brad Savage, and Doug Toby in 'Red Dawn' (1984)
Metro-Goldwyn-Mayer Studios Inc.

Because Patrick Swayze was older than most of the actors, and because he had more acting experience than them, Milius trusted Swayze to control his co-stars. “Milius is a very intense director,” Swayze said in the Red Dawn commentary. “He’s a very wonderful director, but we had to call him the General and he called me, he says, ‘Swayze, you’re my lieutenant of the art. I’m directing these little suckers through you.’ He put a lot of responsibility on my shoulders, and I took it really seriously.”

5. The U.S. military named an operation after Red Dawn.

In 2003, when U.S. troops invaded Iraq, Army Capt. Geoffrey McMurray named the mission Operation Red Dawn. “Operation Red Dawn was so fitting because it was a patriotic, pro-American movie,” McMurray told USA Today. A commander in the 1st Brigade, 4th Infantry Division had already named the target farmhouses Wolverine 1 and Wolverine 2, so McMurray said the name made sense.

6. Milius knew Hollywood would "condemn" him for making the film.

“I knew that Hollywood would condemn me for it,” Milius said in the Red Dawn commentary. “That I’d be regarded as a right wing warmonger from then on, uncontrollable and un-housebroken.” Milius supposedly left one of his guns on his desk while journalists interviewed him, so he demonstrated his ideals well.

“I was the only person in Hollywood who would dare do this movie,” he said. “Hollywood was very left-wing. But I have a lot of contractions. I’m a militarist and an extreme patriot at times, so I believe in all of that rugged individualism hogwash.”

7. Patrick Swayze and Jennifer Grey did not get along.

Not all the actors were thrilled with Milius's decision to put Swayze in charge of the cast. Swayze told Daily Mail that he butted heads with Jennifer Grey in particular, who disliked how he ordered her around. “At the end of Red Dawn, however, when we shot her character’s death scene, she seemed to warm to me,” he said. “It's a tender scene and, as I stroked her hair, it was truly emotional. I think it endeared me to her, and it was clear she and I had chemistry together.” Almost exactly three years later, the pair’s chemistry would ignite the dance floor in Dirty Dancing.

8. Patrick Swayze got frostbite.

Filming in Las Vegas, New Mexico, sometimes meant extremely cold conditions. So cold, in fact, that Swayze ended up with frostbite. “I got frostbite so bad in my hands and my toes, that now if my hands and fingers get the slightest bit cold it feels like someone’s shoving toothpicks under my fingernails,” he said in the Red Dawn commentary.

C. Thomas Howell had a different perspective on the cold temperatures. “You know it’s cold when you’re forced to spoon Charlie Sheen,” he said. “That’s what we were forced to do: to huddle together and pretend we liked each other.”

9. William Smith frightened Charlie Sheen.

William Smith played the Russian Colonel Strelnikov, but in real life he had been a Russian Intercept Interrogator for the CIA. “He was terrifying,” Sheen said in the Red Dawn commentary. “I don’t know if he was in character the whole time, but you couldn’t talk to him on the set. You just kept your distance. But it worked in the movie—look how brilliant he is in the film. He’s an imposing force.”

10. Milius thought Red Dawn was a "zombie movie with Russians."

In the ‘80s, the Cold War was in full swing, and the world lived in fear of a nuclear attack. (Not totally unlike today.) “Red Dawn the film was about the impending possible reality, which at that time was an actual fear of the Soviet Union invading this country,” Milius told Mandatory. “People actually thought that way. That’s why I made that movie, that’s why people liked it. The fear was real and it played on that. That’s what made it an exciting movie.”

Milius compared the film to Close Encounters of the Third Kind. “In this case, I made a movie of the same vein but with Russians. It’s like a zombie movie with Russians. That’s what it was like at the time. People were paranoid about aliens and people were paranoid about Russians. It was Close Encounters with Cold War Russians.”

11. The studio cut a love scene between Lea Thompson and Powers Boothe.

In the Red Dawn commentary, Thompson described a “beautiful love scene” between her and co-star Powers Boothe, who was 13 years older than her. “I say, ‘I’m going to die before having made love. Will you please make love with me?’ We said okay, and disappeared out of frame. And they took the scene out of the movie, which was sad because it explained my character. It was a nice scene.”

12. Fans still yell "Wolverines!" at C. Thomas Howell.

Charlie Sheen, Patrick Swayze, and C. Thomas Howell in Red Dawn (1984)
Metro-Goldwyn-Mayer Studios Inc.

One of the most iconic lines in the movie comes from C. Thomas Howell’s character, Robert. From a mountaintop he shouts “Wolverines!” which is the name the guerilla group gives themselves. It’s also the name of their high school mascot.

“I get that about twice a week in real life,” Howell told USA Today in 2012. “And about 40 times a day through Twitter.” He said in real life he doesn’t shout back, “but on Twitter, I cannot help typing a ‘Wolverine’ with a few exclamation points on it.”

10 Things You Might Not Have Known About Pearl Harbor

Hulton Archive/Getty Images
Hulton Archive/Getty Images

Located on the Hawaiian island of Oahu, Pearl Harbor is best known as the site of the Japanese military strike that propelled the United States into World War II. But Pearl Harbor's contributions to history didn’t begin—or end—on what President Franklin Delano Roosevelt called “a date which will live in infamy,” December 7, 1941. From epic rock concerts to astronaut visits, the storied lagoon has seen quite a lot. Here are 10 things you may not know about it.

  1. Pearl Harbor's Hawaiian name is Wai Momi.

Translated, that means "Pearl Waters"—a reference to the plentiful shellfish that lined its floors. (The area is also known as Pu’uloa, or "Long Hill," due to its terrain.)

Unfortunately, overharvesting, pollution, and human-induced sediment changes decimated the harbor’s native oyster population by the end of the 19th century. But in February 2019, the U.S. Navy announced that it was teaming up with the University of Hawaiʻi’s Pacific Aquaculture and Coastal Resources Center and O'ahu Waterkeeper two reintroduce to native bivalve species: The Hawaiian oyster and the black-lip pearl oyster. Since they filter out pollutants, their presence may help clear the water in the Pearl Harbor area.

  1. A shark goddess was said to live in Pearl Harbor.

According to Hawaiian legend, Kaʻahupahau was a former human who had transformed into a shark. It was said that she lived with her brother (or son) in the caves beneath Pearl Harbor. Together, the pair defended the scenic lagoon and the native people who fished there. In 1902, the entrance channel was artificially widened so large American ships could pass through. (Hawaii wouldn't become a state until 1959, but it was annexed in 1898.) Locals became concerned that the project would upset Kaʻahupahau. When a newly finished dock collapsed in 1913, it was said to be the irate deity’s work. Others speculated that damage to the harbor caused Kaʻahupahau to leave—and she took the oysters with her.

  1. Pearl Harbor’s resident naval station was established in 1908.

In 1887, 11 years before Hawaii’s annexation, the United States was given the exclusive right to set up a naval base in Pearl Harbor. But the federal government didn’t formally establish one there until 1908. Decades later, in 1940, that naval station became the main base of operations for what would soon become the U.S. Pacific Fleet, where it was intended to curb Japanese expansionism. The fleet’s relocation to Oahu set the stage for the devastating surprise attack.

  1. The December 7, 1941 attack on Pearl Harbor came in two waves.

Before the assault on Pearl Harbor, Japan stationed six of its Imperial Navy’s aircraft carriers, which carried 414 planes in total, at a pre-chosen locale 230 miles north of Oahu. The ships maintained radio silence to keep their movements a secret. On December 7, 1941, at 6 a.m., the first wave of Japanese planes took to the air, and just before 8 a.m., they began an all-out assault on the Hawaiian base. Caught unaware, the American forces were pummeled by bombs and torpedoes.

A second wave arrived on the scene at about 8:50 a.m. Unlike its predecessor, this one didn’t include any torpedo planes and it inflicted less damage. Still, by the time Japan’s second wave pilots returned to their carriers at 9:55 a.m., the U.S. had lost 188 airplanes while 159 more sustained damages. Some 21 American ships were sunk or damaged. And then there was the human cost: 2403 Americans died in the attack, and an estimated 1178 others were injured.

  1. Thirty-eight sets of brothers were on the doomed USS Arizona.

Nearly all of the American vessels that were hit during the 1941 Pearl Harbor attack were later repaired, but the USS Arizona wasn’t so lucky. The 608-foot Pennsylvania-class battleship went under after an ammunition magazine exploded. Some 1177 marines and sailors perished aboard the Arizona. Altogether, there were 38 sets of brothers, representing a total of 79 men, on the battleship at the time. Within that group, 63 individual men were killed.

  1. Pearl Harbor was rocked by mysterious explosions in 1944.

On May 21, 1944, a tank landing ship (or Landing Ship, Tank) in the lagoon’s West Loch suddenly burst into flame. Next came a string of explosions that killed 163 people, damaged more than 20 buildings, and took out a grand total of six LSTs. The disaster’s cause has never been verified, but it has been theorized that someone may have accidentally set the whole thing off by dropping an explosive mortar shell.

  1. Japanese Prime Minister Shigeru Yoshida visited Pearl Harbor in 1951.

By all accounts, the visit was a muted affair. Yoshida was returning from a diplomatic visit to San Francisco when he opted to spend a little time in Hawaii. On September 12, 1951, the prime minister briefly met up with Arthur Radford, the commander of the U.S. Pacific Fleet, at Pearl Harbor. Three other Japanese prime ministers have since visited the lagoon. Ichiro Hatoyama dropped by in 1956; Nobusuke Kishi made the trip in 1957; and Shinzo Abe gave a speech there (with Barack Obama by his side) in 2016.

  1. Elvis Presley helped raise money for the USS Arizona memorial fund.

In 1958, President Dwight D. Eisenhower authorized the building of a USS Arizona memorial at Pearl Harbor. Three years later, the king of rock ‘n roll put on a benefit concert to raise money for the project. Presley sang “Hound Dog,” “Heartbreak Hotel” and 13 other classic songs before a roaring crowd of around 5000 fans in Pearl Harbor’s Bloch Arena. The big event raked in over $64,000 and created public interest in the memorial—which was officially dedicated in 1962.

  1. After returning to Earth, the Apollo 11 crew made a pit stop in Pearl Harbor.

Neil Armstrong, Edwin “Buzz” Aldrin, and Michael Collins splashed down in the Pacific Ocean on July 24, 1969. Due to concerns about lunar diseases, the astronauts were confined to a quarantine trailer—which was ferried to Pearl Harbor aboard the USS Hornet. The contraption was later transported to Houston, Texas, with all three space travelers still inside.

  1. The naval base at Pearl Harbor merged with another military property in 2010.

Prior to 2010, Pearl Harbor’s resident naval base and the neighboring Hickam Air Force Base were two separate properties. But that year, they were combined into the Joint Base Pearl Harbor-Hickam. According to its official website, the base currently has a population of over 66,300 and is “home to more than 175 tenant commands, 11 ships, 18 submarines and six fixed-wing aviation squadrons.”

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