1.
fleet, naval squadron, flotilla
A group of warships organized under a single commander for military operations. Used in both historical and modern military contexts, as well as in science fiction and gaming.
Usage
Originally a military term but widely known through historical education, war films, and popular culture. The word gained widespread modern recognition through the game franchise 艦隊これくしょん (KanColle). Also commonly used in science fiction for space fleets.
Etymology
The 連合艦隊 (Combined Fleet) was the main fleet of the Imperial Japanese Navy and features prominently in Japanese World War II history.