1st April in History Hits 1,911 18631st wartime conscription law in US goes into effect 1865-9] Battle at Blakely Alabama 1918 United Kingdom: the Royal Air Force is created from the Royal Naval Air Service and the Royal Flying Corps. 1924 Imperial Airways forms in Britain 1924 The Royal Canadian Air Force is formed. 1941US Navy takes over Treasure Island1945 US forces invade Okinawa during WW II 1952 Big Bang theory proposed in Physical Review by Alpher, Bethe & Gamow 1960 1st weather satellite Share this on WhatsApp Published in Today in History More from Today in HistoryMore posts in Today in History »13th April in history11th April in history10th April in history5th April in History30th March in history