Portal:Aviation/Historical anniversaries/March in aviation/March 21

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March 21

• 1996 - Tupolev and NASA begin joint research into civil supersonic transports using a refurbished Tupolev Tu-144

• 1945 - the Ohka dedicated kamikaze weapon is used operationally for the first time but with no success.

• 1930 - the Chilean army and navy combine their air arms into a separate, independent command.

• 1918 - Germany launches Operation Michael, marking the beginning of the Kaiserschlacht. In the initial attack against the British front west of St Quentin, the German Army Air Service has 1,680 aircraft to the Royal Flying Corps' 579.