Extensive land-based Combined Bomber Offensive bombings of German targets had begun in June 1943, followed by "Crossbow" operations attacking German long range weapon facilities in August 1943 and V-1 launch sites in December 1943. In July 1944 after the V-1 "Robot Blitz" had begun on 13 June, CommanderThomas Hinman Moorer of the Naval Air Atlantic Staff (NavAirLant) provided a Pentagon briefing on a June 1944 plan for F4U squadrons of Marine Air Group 51 (MAG-51) (including VMF-511, VMF-512, VMF-513 and VMF-514) to attack V-1 launch sites from escort carriers in the North Sea[2] with Tiny Tim rockets. The Tiny Tim was a rocket-powered adaption of a 500 lb (230 kg) bomb - each aircraft carrying a single rocket. The plan was disapproved.[2]: a Project Danny was a victim of the intense interservice rivalry that existed in the US armed forces during World War II; Army Chief of Staff General George Marshall stood up and walked out of the briefing: "That's the end of this briefing. As long as I'm in charge there'll never be a Marine in Europe."[2]: a
Had the operation proceeded, MAG-51 would have been the second Marine Corsair squadrons to deploy from aircraft carriers,[2] the first being at the Bombing of Rabaul in November 1943.[3][4][5]
The only contribution the United States Navy did make to Crossbow operations were the Operation Anvil drone attacks on Crossbow sites in August 1944 using surplus bomber aircraft converted to radio-control bombs.
^Shaw, Henry I.; Douglas T. Kane (1963). "Volume II: Isolation of Rabaul". History of U.S. Marine Corps Operations in World War II. Retrieved 18 October 2006 – via Hyperwar Foundation.