Wards fought by the United States of America are the war on Iraq, the Libyan Civil war, the War on West Pakistan and the war in Afghanistan. Additional countries the US engaged in war in are Kosovo, Bosnia, Somalia and the Dominican Republic.
The U.S. has fought in a total of thirteen wars starting with the American Revolution and going through the Afghanistan War.
The US has fought several wars.
The cold war included no actual combat. It was fought with threats of nuclear warfare. Also fought with "proxy" wars. (Vietnam and Korea) The soviets supported North Korea, and the US supported South Korea. These were wars fought between the two countries through other countries.
The Vietnam War
The Seminole Indians and the US.
WWII and WWI
If you mean the northern states, they fought in the Civil War. Other than that one time, the US has always been united. Any wars which involved the north, involved the entire US. The US has, of course, fought in two world wars and many other wars.
The US fought three wars to obtain land: 1. Indian Wars (1620-1890) 2. Mexican War (1846-1848) 3. Spanish-American War 1898
55,000,000
Which war? US fought many many wars.
Spain and the US.
War of 1812