 Via Walter Caldonazzi there were contacts to the Heinkel factories in Jenbach, where drive components for the Messerschmitt Me 163 and V-2 rockets were manufactured.In some cases, Maier had received information from front-line soldiers on leave about the industrial facilities.American and British bombers were able to strike armaments factories such as the secret V-rocket factory in Peenemünde and the Messerschmitt plants near Vienna.