They were all executed during the French Revolution
I have no idea i have gone over it 20 times and believe me this one is hard but in the lesson its probably the answer i know you can do it
Here are some of the weapons first used in WWI. Airplanes, Derigables, poison gas, flamethrower, and tanks. Other weapons that were invented before the war but not used on a wide scale or were not reliable until WWI were the machine gun, submarines, torpedoes, small mortars and very large caliber artillery. WWI also saw the use of the radio for the first time in combat conditions.
