What is the browser game Kantai Collection heavily inspired by?

Kantai Collection is a browser game heavily inspired by the Second World War because it revolves around the concept of anthropomorphized naval warships from various nations, which were a prominent feature of naval warfare during the war. The game draws inspiration from the historical context of the war, featuring shipgirls who are personifications of the different warships used during that time. These shipgirls are portrayed as young girls with personality traits resembling their respective warship counterparts, creating a unique blend of historical elements and fantasy gameplay.