Submarine warfare

thumb|upright=1.35|French Georges Leygues-class frigate|F70 type frigates (here, ) are fitted with [[variable depth sonar (VDS) type DUBV43 or DUBV43C towed sonars.]] thumb|upright=1.35|A sonar image of the Soviet Navy minesweeper T-297, formerly the Latvian Virsaitis, which was shipwrecked in December 1941 in the [[Gulf of Finland.]]

naval warfare conducted by submarines

Military Doctrine

1914 World War I naval campaign fought by German U-boats against the trade routes of the Allies

1937 diplomatic conference in Switzerland

fought by Austria-Hungary and German Empire against the Allies during World War I

overview of naval operations during the Indo-Pakistani War of 1971