History: A base for one-man submarines that were to be deployed in suicide attacks against the Allied fleet in the event of an invasion of the home islands during World War II. 1940s. [2000 x 1429]

https://i.redd.it/sd7xfhzf2b961.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/kq7fft/a_base_for_oneman_submarines_that_were_to_be/?utm_source=ifttt