They supported Cuban Independence.
Platt Amendment Foraker Act
The Korean war
Given that the revolutionary war is the war that created the USA, it could be said that the USA was involved from the start.
Spain and America
it was 2004
russia
America did get involved
German submarines were in the US east coast of America so that was the final straw for America, so then we declared war
The bombing of Pearl Harbor.
Please define "Eritrea."
April 1917
it wasn't