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Comparing America's Wars by Duration in Months

The Length of American Wars


Below is a look at America's major wars and their length in months. Time periods are rounded up or down for ease of comparison. Current conflicts are italicized and are colored red. The longest wars are listed first in descending order by lenth. The start dates reflect when the United States entered the wars.


Afghanistan-- October, 2001 to Present (as of July, 2018 )= 200 months

Vietnam War--August, 1964 to April, 1975= 116 months (American involvement began in the late 1950s, but major U.S. combat forces began taking part in large unit combat in 1964)

American Revolution--April, 1775 to September, 1783= 100 months

Iraq War--March, 2003 to Present (as of January, 2011)= 94 months

U.S. Civil War--April, 1861 to April, 1865= 48 months

World War II--December, 1941 to September, 1945= 45 months

World War I--April, 1917 to November, 1918= 19 months

Korean War-- June, 1950 to July, 1953= 37 months

War of 1812--June, 1812 to February, 1815= 32 months

U.S.-Mexican War-- May, 1846 to February, 1848= 21 months

Spanish-American War--April, 1898 to August, 1898= 5 months

Gulf War--January, 1991 to March, 1991= 3 months




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