American submarines in the Pacific
The Tambor-class submarines with which the US Navy went to war were fast enough and far-reaching to become submarines to be deployed throughout the fleet, according to naval planners. But they never had the opportunity to prove their qualities.
The attack on Pearl Harbor changed everything. From December 7, 1941, the US Navy again learned how to use its fleet of submarines. Because there was no war fleet, submarines were currently the only naval offensive weapon available. They were sent with an instruction to dive anything anytime.