Vietnam War: eight years, five months (August 1964 to January 1973).
Revolutionary War: six years, nine months (July 1776 to April 1783).
Afghanistan: five years, one month (October 2001 to present).
Civil War: four years (April 1861 to April 1865).
World War II: three years, eight months in the Pacific (December 1941 to August 1945).
Iraq: three years, eight months (March 2003 to present).
Korean War: three years, one month (June 1950 to July 1953).
War of 1812: two years, six months (June 1812 to December 1814).
U.S.-Mexico War: one year, 10 months (April 1846 to February 1848).
World War I: one year, seven months (April 1917 to November 1918).
Spanish-American War: eight months (April to December in 1898)
Persian Gulf War: one and 1/2 months (January to February in 1991).
http://www.sfgate.com/cgi-bin/article.cgi?f=/n/a/2006/11/25/national/w092009S78.DTL
FOR A COMPLETE! LIST:
http://en.wikipedia.org/wiki/List_of_United_States_military_history_events
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.
Iraq
World War 1 and World War 2 were the last declared wars that the US participated in.I'm sure however that there have been small regional warsafter World War 2, that the US did not participate in that were declared wars by the regional participants in those wars.
The US fought three wars to obtain land: 1. Indian Wars (1620-1890) 2. Mexican War (1846-1848) 3. Spanish-American War 1898
Because the US Army manages US wars; the US Army has jurisdiction over land wars. USAF & USN SUPPORT the US Army. The US Army always preferred to study Europe for future wars; the US Army absolutely did not want to fight any Asian Wars. Money (Defense Budgets) were 99% allocated for European Wars. Asia represented a dirty filthy ruthless war fought without mercy. Europe represented chivalry and the fine art of hi-tech weapons.
The US has fought several wars.
When John Adams was US president the US was not involved in any wars.
The Global Wars on Terrorism, the wars in Iraq and Afghanistan.
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.
Iraq
5
US Civil War and Indian Wars (Frontier Wars).
Please specify which two wars you are talking about.
The US was not in any wars while Pierce was president.
Two
Dwight Eisenhower was the only US president to serve in the army in both world wars.
No, the United States has not been in three world wars.