The most well-known was the one which took place on July 20, 1944 and was part of a plot called "Operation Valkyrie." More than 200 people were involved, chiefly the German army officer Claus ...
an Army officer convinced he must save Germany from Adolf Hitler, is recruited to mastermind a real plan. To do so, he arranges for the internal emergency measure, Operation: Valkyrie, to be ...