https://www.skeptic.org.uk/2023/07/what-really-happened-in-the-case-of-the-philadelphia-experiment/
On the 28th of October 1943, at the height of the Battle of the Atlantic, a strange, top-secret experiment took place in the US Navy docks in Philadelphia. What was about to be tested would turn the tide of a war that had cost 45 Allied ships in January of that year alone. Called Project Rainbow, Dr Franklin Reno intended to use the physics of Einstein’s Unified Field Theory to surround a ship with a special force-field that would render the ship invisible to radar. The subject of the experiment was to be the USS Eldridge, a Cannon-class destroyer of 1,600 tons, with a crew of 216 officers and men. The ship had only been launched in July of that year and had yet to see active service.
Along with navy personnel on other ships and stevedores on the dockside, various top brass looked on expectantly while the boffins fired up their strange machinery. But, when the test began, the ship suddenly began to glow bright green before completely disappearing in front of the disbelieving eyes of hundreds of incredulous witnesses.