In the summer of 1943, Goerdeler confidently told Jacob Wallenberg that the "putsch" to depose Hitler would happen for certain "in September", even through Goerdeler had yet to win over any active-duty senior officers. After five years of trying, the only senior officers Goerdeler had recruited were Field Marshal Erwin von Witzleben, whom Hitler had forced into retirement in early 1942 and General Ludwig Beck who had resigned in 1938. In September 1943, Goerdeler attended a meeting at the home of Olbricht where together with his host Olbricht, General Beck and von Tresckow he finally won over the vacillating Field Marshal Kluge into joining the conspiracy. However, no sooner than Kluge was finally persuaded to join the plot than he was badly injured in a car accident that removed him from active command. As Goerdeler gloomily noted, Kluge's successor, Field Marshal Ernst Busch, was a convinced National Socialist who was clearly not ""verschwörungsfähig"" (plot-worthy).