noun
armed conflict; military warfare
Refers to conflict conducted with weapons and military force, as opposed to diplomatic, economic, or ideological struggle.
両国は武力戦に突入した。
The two countries entered into armed conflict.
戦争 is the general term for war, whereas 武力戦 specifically highlights the military/armed aspect.
Compound of 武力 (military force) and 戦 (war, battle).