All of the continents, Europe, Asia, Africa, Australia, North America, and South America, with the exception of Antarctica, were involved in World War I.
England and America
Since America was only involved with one Japanese War you must be referring to WWII. In that case, Japan attacked America with airplanes at Pearl Harbor on December 7, 1941. That's why Americans got involved.
The Vietnam war. Or the Resistance War Against America.
It got America involved in the war. Who knows what would have happened if they didn't get involved.
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.
it was 2004
Spain and America
russia
America did get involved
The United States did not directly intervene militarily in the Eritrean-Ethiopian War, which lasted from 1998 to 2000. However, the U.S. played a diplomatic role, encouraging negotiations between the two countries and supporting peace efforts. After the conflict, the U.S. continued to engage in humanitarian assistance and development efforts in Eritrea. Overall, while the U.S. was not a combatant, it was involved in efforts to stabilize the region.
German submarines were in the US east coast of America so that was the final straw for America, so then we declared war
it wasn't
The bombing of Pearl Harbor.
April 1917
Eritrea won the war.