Signal Corps By v_scott20 Feb 26, 1851 A New Sign Language for Deaf-Mutes Jan 1, 1854 Dr. Myer enters the Military Period: Apr 12, 1861 to May 9, 1865 Civil War Jun 1, 1862 Telegraphs Feb 9, 1870 National Weather Service Jan 1, 1878 Pigeons Period: Apr 1, 1898 to Aug 1, 1898 Spanish-American War Period: Jun 28, 1914 to Nov 11, 1918 World War I Jul 18, 1914 Army Air Service May 1, 1937 Radar Demonstration Period: Sep 1, 1941 to Sep 2, 1945 United States enter World War II Period: Jun 25, 1950 to Jul 27, 1953 Korean War Period: Nov 1, 1955 to Apr 30, 1972 Vietnam War Jan 1, 1981 Satellites
