Bing Image Creator - Giant Enemy Crab

I feel like the most fun you can have with AI art, besides spamming an ocean of low-quality, uncanny-valley ecchi poses or finding out what a bot will diffuse when the prompt is word salad, is taking some time to study the raw details of more complex calculations like this.

Like, if you just look at the crab, it looks darn good, and its pretty impressive that math and chaos could come together so well. Although, you do have to appreciate how on-brand it is for the crab's claw to be messed up--maybe chock it up to battle damage.

But then, the details around the edges of the image are just fascinating. The wacky seagull-things, the messed-up knights with their sword-shield-spears and sword-spear-helms and such, the inexplicable halberd that is the same size as the crab, and whatever the hell is going on with that boat on the right side. Feeling your brain slowly notice that crap is like gradually becoming lucid in a dream.

Is it based on a battle that actually took place in Japan?