Beach of the War Gods (1973)

In the waning days of the Ming dynasty, Japanese marauders raid villages on the Chinese coast. A wandering swordsman single-handedly dispatches a group of the foreign thugs, and agrees to help defend the town. He assembles a core team of highly skilled warriors, and together they train the townsfolk to stand up to the foreign pirates, using strategy and skill. When the army launches an all-out assault on the town, a ferocious battle rages, leading to final conflict on the Beach of the War Gods.

Unfortunately the movie Beach of the War Gods is not yet available on HBO Max.