Unlike December 7, 1941, April 6, 1917 is not a date that lives, either in infamy or fame. Few Americans even know that it marks the country’s entry into World War I. It was on that spring day that the U.S. House of Representatives voted, at President Woodrow Wilson’s request, to declare war on Germany. The U.S. Senate had voted two days earlier. It was an earthquake in history, with aftershocks still reverberating but largely to silence.