BirnyX does World War 2 Airsoft in their Operation Door video... "This ww2 airsoft war was filmed during an international airsoft event 'Operation Door' organized by GKDT and Mor-Ho reenactment groups in Kúty in Slovakia. It was based on the true operation Hydra, which was a Royal Air Force attack on the Peenemünde Army Research Center on the night of 17/18 August, 1943 to stop Nazi Germany's V-weapon program.