'Hello, Boys!' is a collection of poems written by the American author Ella Wheeler Wilcox, mostly in support of the military during World War I. Some of the titles included are 'Come Back Clean', 'Passing the Buck', 'A Song of Home', and 'The Blasphemy of Guns'. Here's an excerpt from 'Come Back Clean': "This is the song for a soldier / To sing as he rides from home / To the fields afar where the battles are / Or over the ocean's foam."