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Airplanes with machine guns
Enemy pilots began to fight each other in the air. At first, they tried throwing grenades at each other or shooting with rifles and pistols. This didn't work very well. An invention called an "interrupter" was invented by the Germans that allowed the machine gun to be synchronized with the propeller. Soon all fighter planes used this invention. -
Gas Masks
John Haldane came up with a rudimentary gas mask to protect Allied troops during WWI. Unprepared for German forces to use chlorine gas as a weapon, many Allied soldiers suffocated, unprotected, during the Battle of Ypres in 1915. -
tanks
In World War 1 tanks first appeared at the Battle of Flers-Courcelette in September 1916. It was the first time tanks had ever been used in a military conflict. The British sent 49 tanks into the battle. WW1 tanks were very slow and couldn't exceed 4 miles an hour. -
Poison Gas
The first successful use of chemical weapons occurred near Ypres when the Germans sprayed chlorine gas from large cylinders towards trenches held by French colonial troops.
