America's Deadliest BattleAmerican fighting men had never seen the likes of it before The great battle of the Meuse Argonne was the costliest conflict in American history, with 26,000 men killed and tens of thousands wounded. Involving 1. 2 million American troops over 47 days, it ended on November 11 what we now know as Armistice Day and brought an end to World War I, but at a great price. Distinguished historian Robert Ferrell now looks back at this monumental struggle to