The Sub That Sank a Train
well not literally. but the USS Barb (SS-220) was credited with blowing one up when a shore party was dispacted to blow up railroad tracks and got a train as a bonus.
Barb was sent to the U.S. for a yard overhaul and alterations, which included the installation of 5 in (130 mm) rocket launchers at the Captain's request. Returning to the Pacific, she commenced her 12th and final patrol on 8 June. This patrol was conducted along the coasts of the Sea of Okhotsk. For the first time in submarine warfare, Barb successfully employed rockets, against the towns of Shari, Hokkaido; Shikuka, Kashiho; and Shiritoru on Karafuto. She also bombarded the town of Kaihyo To with her regular armament, destroying 60 percent of the town. She next landed a party of carefully selected crew members who blew up a railroad train. This is notable as the only ground combat operation that took place on the Japanese home islands.