Incessant bombing of Germany's infrastructure and cities caused tremendous casualties and disruption. Internally, Hitler survived a number of Nazi inner assassination attempts. The most serious was the 20 July 1944 plot. Orchestrated by Claus von Stauffenberg and involving among others Erwin Rommel and Alfred Delp, the plot had intended to place a time bomb in a position to kill Hitler but a number of unscheduled factors and operation failures led to its failure. Adolf Hitler was only slightly injured.