The Montauk Project is considered an outgrowth of the experiments carried out where in 1943?
Philadelphia Experiment The Philadelphia Experiment is an alleged military experiment supposed to have been carried out by the U.S. Navy at the Philadelphia Naval Shipyard in Philadelphia, Pennsylvania, sometime around October 28, 1943. The U.S. Navy destroyer escort  was claimed to have been rendered invisible (or "cloaked") to enemy devices.
T40 Whizbang The Rocket Launcher T40/M17 (Whizbang) (sometimes spelled "WhizBang") was a tank-mounted multiple rocket launcher used by the United States Army during World War II. The launcher was placed atop the Medium Tank M4, and fired a barrage of 7.2 in (180 mm) T37 HE or T21 Chemical rockets from 20 launch tubes. It was developed and used in the late stages of World War II; it saw limited combat in 1944–45. An experimental short variant of the T40 was also developed.