On April 6th, 1917, the United States Congress declared war on Germany, thus entering WWI, the "war to end all wars". President Woodrow Wilson, the peace-lover, asked for war. Congress stood up and cheered its enthusiasm. As Wilson later said,
"Isn't it strange that men should cheer for war,"
This is the thing we fight:
A cry of terror in the night;
A ship on work of mercy bent--
A carrier of the sick and maimed--
Beneath the cruel waters sent,
And those who did it, unashamed.
--Edgar A Guest, c. 1917-18