S: (n) war, state of war (a legal state created by a declaration of war and ended by official declaration during which the international rules of war apply) "war was declared in November but actual fighting did not begin until the following spring"
S: (n) drug war (conflict between law enforcement and those who deal in illegal drugs)
S: (n) trench warfare (a struggle (usually prolonged) between competing entities in which neither side is able to win) "the hope that his superior campaigning skills would make a difference evaporated in the realization that electioneering had become a form of trench warfare"
S: (v) contend, fight, struggle (be engaged in a fight; carry on a fight) "the tribesmen fought each other"; "Siblings are always fighting"; "Militant groups are contending for control of the country"