Wars and Minnesota By lesct210 Period: May 4, 1800 to May 4, 2000 Wars and Minnesota May 4, 1849 Minnesota Becomes A Territory. May 4, 1855 Minneapolis Is Established. May 11, 1858 Minnesota Becomes A State May 4, 1861 The Civil War Breaks Out. May 4, 1862 US Dakota War Starts. May 4, 1862 US Dakota War Ends. May 4, 1862 38 Dakota Are Hanged. May 4, 1863 Lincoln Announces The Emancipation Proclamation. Aug 10, 1863 The Battle Of Gettysburg Is Fought. May 4, 1865 Civil War Ends. May 4, 1871 US Passes Law Making Treaties Illegal May 4, 1914 World War 1 Starts May 4, 1915 The First Poison Gas Is Used In Europe. May 4, 1917 US Enters World War 1. May 4, 1918 World War 1 Ends. May 4, 1931 World War 2 Starts. May 4, 1942 Allies Defeat Japan. May 4, 1945 World War 2 Ends. May 4, 1949 Soviets Test Their First Atomic Bomb. May 4, 1950 The Korean War Starts May 4, 1954 Cold War Starts Between The US And Soviets. May 8, 1990 Cold War ends