Aerial dogfights are almost as well-remembered about First World War combat as the trenches. Advances in this field of warfare increased dramatically during the four years of war. Originally, fighter pilots would only have items such as bricks to drop onto the heads of enemy fighter pilots. Germans would even drop steel darts; they could split a man in half! By the end of the war, machine guns were mounted on the front and had timers so bullets would be shot through the gaps in the propeller.