The martial art adapts to the weapons and enemies of the period. Each weapon wants to be used a different way. A katana loves broad sweeping motions while a rapier loves thrusts.

A broad definition of 'martial art' helps here. Knights in 15th century Europe were trained in fighting styles adapted to their weapons and armor. Japanese warriors were likewise trained in a martial art during the same period. Warfare always always adapts to the needs to the day; doesn't matter if a martial artist is fighting humans or dinosaurs.

Remember, Humans are the great murderers of Earth. If there's something that can be killed, we will find a way to do so... Then codify it.

The martial art adapts to the weapons and enemies of the period. Each weapon wants to be used a different way. A katana loves broad sweeping motions while a rapier loves thrusts. Likewise, armor adapts to the current weapons.

A broad definition of 'martial art' helps here. Knights in 15th century Europe were trained in a 'martial art' specific to European weapons and armor. Japanese warriors were likewise trained in a martial art to their weapons and armor. Warfare always always adapts to the needs to the day; doesn't matter if a martial artist is fighting humans or dinosaurs.

An example of an adaptation might be a preference for hammers and maces against heavily armored monsters. Against monsters that tend to swarm (zerglings), weapons that cut large swathes such as broad swords or halberds would work best. Each of these weapons demands a different fighting style for effective use.

Remember, Humans are the great murderers of Earth. If there's something that can be killed, we will find a way to do so... Then codify it.