WWII, submarines could destroy many ships. The submarines helped the US and the Japanese in the fights. US submarines sank more than
30% of Japan
’
s naval fleet. They were also crucial in the sinking of
German U-boats, which tended to dominate most other fights. They were a vital part of the weaponry during WWII because of their ability to sink battleships, aircraft carriers, and cargo ships.
During WWII, submarines sank around 5 million tons of battleships in all. They were able to do this because of their ability to quickly move around the slower battleships. Also, they were mostly underwater and hard to spot. Both US and Japan lost a lot of battleships to each other