The Hundred Years War, with the English against the French from 1337 to 1453, thus lasting for 116 years.
It was Great Britain.
there is none. the longest war in world war 1 is world war 1. it would have to be the longest battle. :)*
Vietnam
The Vietnam war was the longest war American had fought in. We got involved with the war in 1954 and it ended in 1973. 58,000 Americans were killed in the war and 2-3 million Vietnamese were killed as well.
World war three has not been fought yet.
World War 1 was fought against primarily Germany.
World War I was fought between 1914 and 1918.
No, the United States did not fight in the eastern front in World War I (or even in World War II). The eastern front, in both World Wars, was mainly in Russia and was fought primarily by Russia. The U.S. did deploy troops to Russia during the Russian Civil War, right after World War I, but it was a short stay and the U.S. troops did not see much fighting. The longest war the U.S. has fought so far has been the war in Afghanistan, which, as of writing this in November 2015, is now just over 13 years old (while the U.S. officially ended its deployment there in late 2014, there are still U.S. troops fighting there). The longest declared war that the U.S. fought was the war against Japan during World War II- it started on December 7, 1941 and ended when Japan surrendered nearly four years later on September 2, 1945.
"I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones." ~ Albert Einstein
Germany fought the us in world war 1
world war one fought from the years of 1914-1918
world war two was actually fought in Idaho.