Combat area and War zone

Combat area noun - A military area where combat forces operate.

War zone and combat area are semantically related in military area of war topic. In some cases you can use "War zone" instead a noun phrase "Combat area".

War zone noun - A combat zone where military operations are coordinated (especially a designated area in international waters where the rights of neutrals are not respected by nations at war).

Combat area and war zone are semantically related in place of warring topic. You can use "Combat area" instead a noun phrase "War zone".