2014 Event Sweden is searching for a potential Russian submarine intrusion in its waters after detecting a Russian-language emergency communication; Russian officials deny knowledge of any distressed submarines operating in Sweden's territory 1986 Event President Reagan orderes 2 Poseidon-class submarines be dismantled 1967 Event Government bans submarines near South Africa 1943 Event British dwarf submarines attack Tirpitz 1942 Event German submarines attack Aruba oil refinery 1912 Event 1st U.S. submarines with diesel engines commissioned, Groton, Connecticut
