In 1597, Korean admiral Yi Sun-sin, who had successfully managed the construction of a formidable fleet of warships, was stripped of his rank, tortured, and nearly executed, with naval command transferred to his rival, Won Gyun, due to political machinations.
Won Gyun promptly loses much of the fleet in several disastrous engagements with the Japanese, leaving the Koreans heavily outnumbered.
Yi is hurriedly reinstated, but by this point he commands just 13 ships against a fleet of at least ten times that size. Many of his ships are crewed by survivors of the previous battles, and fear a return to combat.
Yi carefully selects a narrow, shallow strait for his "final stand" limiting the size and number of Japanese ships that can attack simultaneously.
Yi's flagship initially engages the Japanese attackers alone, due to the other ships' hesitancy. As it repels one ship after another, like "a castle in the sea", the other ships eventually join, and the Japanese fleet is repelled.
The Japanese lose at least 30 ships. The Korean fleet loses none.
Although helldivers is currently in a bad spot right now, the battle/fall of malevelon creek actually did get a sabaton inspired song and it's pretty good. I'm actually subbed to the guitar solo guy's patron so it was a nice surprise to see his name in the credits.
Context for those unfamiliar: Helldivers 2 is a live service third person shooter heavily inspired by starship troopers. The overall "story" is created by the game master and community through objectives. Up until this point, the only enemies were bugs, which were largely melee units and not terribly dangerous if you kept your distance. Malevelon creek was the first planet where many players encountered the automatons, who absolutely shoot back. That, combined with the dense foggy jungle planet, lead to significant difficulty in reclaiming the planet. Eventually the supply lines got cut off, meaning no players could enter the planet. The ones already there could still stay and fight, which many did for 3 desperate days before the planet finally fell.