hostilities
n. C / Un. fighting between enemies, especially during a war. It can also mean very unfriendly behavior between people who disagree.
n. acts of warfare or overt military conflict between opposing forces. Often refers to the commencement or cessation of armed combat in a formal context.
The two countries finally ended their hostilities after years of fighting.
The government called for an immediate end to hostilities to allow humanitarian aid to reach the affected civilians.
Although a formal treaty was never signed, the cessation of hostilities allowed for a fragile peace to take root along the disputed border for the first time in decades.
Usually plural when referring to military conflict; the singular form 'hostility' more commonly refers to the abstract feeling of ill will.