World War I was the beginning of Modern Warfare. The Great War's new weaponry: poison gas, machine guns, tanks, airplanes, and even submarines forever changed the way battles were fought. Who would ever think that a single bullet from an assassin's gun could start a war that would be fought on a larger scale than ever before? Probably no one--but that's what happened In this book, kids will see for themselves the events leading up to the first World War--and will hunker down in the trenches of eastern Europe with the troops of many nations as they fight the war to end all wars.