Operation Valkyrie
Apart from Hitler, only Colonel-General Friedrich Fromm, as commander of the Reserve Army, could activate Operation Valkyrie. For the planned coup to succeed, therefore, the plotters had either to win Fromm over to the conspiracy or to neutralize him in some way. Fromm, like many senior officers, largely knew about the military conspiracies against Hitler, but neither supported them nor reported them to the Gestapo.