1947

• On July 26, President Truman signed the Armed Forces Unification Act, creating the Air Force coequal with the army and the Navy
   
• On October 14, the first level supersonic flight was made by Capt. Charles E. Yeager in a Bell X-1; the Mach number achieved was 1.06.

Bell XS-1  proving supersonic flight at Mach = 1.06. NASA photo

U.S. Marine Corps, 1936 to 1970

Other Facts from 1947

President: Harry Truman