Between two wars : Gettysburg, 1865-1914 -- "The whole structure crumbles" : Gettysburg and the world, 1914-1917 -- War and "invasion, " 1917 : brothels, bars, but no B.A.R.s -- Goodbye Gettysburg, hello France--"we're going to square our debt to you" -- "Treat 'em rough" : Camp Colt and the genesis of an American leader -- Into the Argonne -- "The whole camp had to be considered as exposed" : the ordeal of the Spanish influenza -- The end of the war and beyond -- Epilogue.