Tells why America abandoned its isolationism to participate in World War I, and its significance for America.

The sinking of the "Lusitania" -- Storm clouds over Europe -- The opening clash -- The great neutral -- Deadlock : 1915 -- Attrition : 1916 -- An American crusade -- Crisis : 1917 -- Mobilizing a nation -- The Battle of the Atlantic -- Convoy to France -- Over there -- The new storm -- Devil Dogs of Belleau Wood -- Turning the tide -- Knights in the air -- Into the Argonne -- The eleventh hour -- The road home -- Reckoning -- The war to end war.