The Great War pitted old-school battlefield tactics with modern killing machines, to terrifying effect. How much do you know about World War I weapons?
After seeing their infantry chewed up by trench warfare, Britain was all-in on tanks. The country produced perhaps 2,600 during the war.
Edwin Harris Dunning, a British pilot, made the first landing on a ship in 1917. Sadly, on his second landing attempt, he was hurt and then drowned.
The German MP 18 was an open-bolt blowback design, which greatly increased its firing rate. It could shoot roughly 500 rounds per minute.
The Allies constructed and deployed hundreds of tanks. The Germans, however, were slow to adopt the devastating technology .
Germany lagged behind the Allies in naval power, so it invested heavily in U-boats, its version of a submarine. German subs generated huge fear among Allied sailors and civilians.
Most grenades had a delay of about five or five and a half seconds. Throwing too early or too late often had disastrous consequences.
Artillery was one of the most common weapons of this war of attrition. The 98/09 had a range of just over 3.5 miles.
Germany deployed only about 20 A7V tanks during the war. Germany was behind the curve when it came to tank deployment in this particular conflict, but they made up for it in World War II.
Both sides used massive amounts of poison gas and, although it made life miserable for the soldiers, these chemicals didn't alter the strategic trajectory of either side.
The Allies did use flamethrowers, but no one could top Germany's deployment of these fire-spewing weapons. They were exceptionally good for clearing out deep trenches full of enemy soldiers.
France had just 140 aircraft at the war's start. By the end, though, they had at least 4,500 of the machines at their disposal.
Horses died in appalling numbers during the war, meaning that Britain needed constant reinforcements. By some estimates, 1,000 per day were shipped from the United States.
No wonder soldiers were so terrified of confronting machine gun nests -- some guns could blast 600 rounds per minute, devastating an entire group of unprotected men.
The U.S. developed a pilotless plane loaded with munititions and stablized with a gyroscope. But the system was too unwieldly for any real use during this war.
The Whippet was a lighter, faster tank meant to accompany larger, slower tanks. It weighed only about 14 tons and could top 8 mph.
The Germans launched thousands of the shells, but much of the gas was blown the wrong way by the wind. Even then, it didn't matter because the extreme cold froze the xylyl bromide and made it a useless weapon.
The Little Willie could only go about 3 mph. The first tanks were prone to malfunction and often broke down before they ever encountered enemy fire.
They sometimes used so-called acoustic locators, which were simply large horns that captured and amplified sounds. Radar didn't really appear until World War II.
The first truly effective tracer bullets made their appearance during World War I. They were filled with chemicals that left a phosphorescent trail.
As infantry advanced across the battlefield, artillery gunners would initiate a creeping barrage just ahead of the soldiers, with the idea that the exploding shells would clear enemies from their path.
At the Battle of the Somme, the Allies first attempted the creeping barrage, and it worked. Unfortunately for the British, they didn't adequately follow up their gains with reinforcements.
The ugliness of poison chemicals was too awful even for a world war, leading to a battlefield ban. However, chemical weapons have still been used in isolated areas during certain conflicts, such as the Iran-Iraq War.
Stirnpanzers were pieces of metal that strapped onto the front of existing helmets. They added a bit of protection to soliders who were vulnerable each time they popped their heads up from the trenches.
Engineers in the United States pioneered the technologies that allowed for voice communications with pilots. The first systems were installed in 1917. These radios made it much easier for pilots to coordinate their attacks.
Allied forces unexpectedly blew through many thousands of shells, leading to a shortage among British troops. As a result, there was widespread negative publicity that caused a political crisis among leaders.
By 1918, the French had manufactured about 3,000 of the FT tanks, which are often described as one of the first truly modern tanks. The tank had a crew of two and carried enough fuel for eight hours of operation.
The French began using these rifles in the 1880s. The bolt-action 8mm was used often during World War I and lingered around for World War II, too.
Ships dropped depth charges, which were explosives set to blow up once they sank to a specific depth. These newfangled weapons helped many ships survive submarine attacks.
The Langer Max (or Long Max) was a massive German artillery gun. It fired enormous 15-inch (38-centimeter) shells. Only eight of these unwieldy guns were built.
France created the M1916 37mm, which was better known as the one-pounder. It was often used to destroy machine gun emplacements.