Denmark, Maine honors those from the town who served in the Revolutionary War from 1775 to 1783, the War of 1812 from 1812 to 1815, the Aroostook War from January to April 1839, the Mexican War from 1846 to 1848, in which none are known, the Civil War from 1861 to 1865, the Spanish-American War in 1898, World War I from 1914 to 1918, World War II from 1941 to 1945, the Korean War from 1950 to 1952, and the Viet Nam War from August 5, 1964 to May 7, 1975, with 180 days active service or more.