if your talking about ww1...they came in a year after the Germans sank the passenger liner the lusitania that had Americans on board
Middle of 1917.
AMERICA after world war 2
When America won the Mexican-American war.
world war 3
Come to America
September 13th, 2016.
Since you didn't say WHICH war, there is no way to answer the question.
Most of them came because they thought theyd have better lives in america
America joined WWII when Japan bombed Pearl Harbor in December 1941.
War Horse, the movie, came out on Christmas Day, December 25, 2011, in the USA.
The US joined the war because of the bombing of Pearl Harbour,it had started in Europe
Since the US became independent of Britain as a result of the Revolutionary War, Britain did not come to set slaves free in America. It was not until after the Civil War that the slaves were freed by constitutional amendment.