Not long, Since about 2001, Afgahnistan has been our objective, But we have killed Osama bin Laden, that was now, 2011 so, not very long.
The US has been fighting in Afghanistan longer it was fighting in Vietnam. It is the longest war in US history.
It was lost to the us after the Mexican and American war- the war was from 1846-1848 Chaz
Yes many times, and for long periods of time.
{| |- | The US involvement in Vietnam began in the 60's. The French had been involved in the war for a long time. Vietnam War went forward for a decade. |}
from Dec 1941 to Aug 1945
80 years
Of course. If it hadn't been for us fighting in WW2, it probably would not have been won by the allies. However, our involvement was unavoidable no matter how long it took.
80 years. The Revolutionary War ended in 1781 and the Civil War began in 1861.
us civil war
Traditionally it has been the US Civil War and WW2.
There has never been a war in which foreign military of opposition has ever been inside the US. Allied military has been present during times of war for caravan movement AKA Canadian and Australian troops accompanying US convoys to Europe.
The Global War on Terrorism began on 9/11/2001. US troops deployed to Southwest Asia October 2001.