General George Washington was appointed as commander-in-chief of the colonial army, and, as you already know, later became the first president of the United States of America.
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.
There were of course stories, but lies were fed into the public view, when stories were told, no one believed them. Who can lead genocide on such a massive scale? No one thought they (The Germans) could. But they did...