This is the 1423rd most frequent Japanese word.
戦闘
Combat; battle; fight.
戦闘 is used here to denote a literal battle or conflict.
戦闘が始まった。
The battle has begun.
戦闘 indicates a physical confrontation or war-related skirmish.
彼は戦闘で負傷した。
He was injured in the battle.
戦闘 refers to combat mechanics within a game context.