He played the game in his usual combative style.

He was very combative when the police tried to arrest him. Another good sentence would be, the dog was combative while his owner clipped his nails.

The security guard was called because an intoxicated fan was loud and combative.

Combative is a adjective that describes someone who is "ready or eager to fight". It's often a nicer way of calling someone "warlike" but both have the same general meaning.

Combative behaviour.