The heavy bomber missions caused serious problems in the beginning of the operations in Normandy. The first two strikes on Caen resulted in numerous casualties to French civilians. Sometimes friendly troops were victims of misplaced bomb strikes. In the Normandy campaign, as in other campaigns, air and land forces had to get used to working together. U.S. General Omar Bradley remarked after the war that We went into France almost totally untrained in air-ground cooperation. In the early stages of the Battle of Normandy some "disconnects" did occur between the air and land communities.