warfare

open

The two neighbors' dispute over the fence escalated into open warfare last summer.

conventional, modern

biological, chemical, germ, nuclear

class, gang, internecine, tribal

guerrilla, siege, trench

aerial, air, naval, submarine

jungle, mountain

economic, ideological, psychological

The two nations engaged in economic warfare by imposing strict trade barriers.

engage in

~ against

The government launched a campaign of warfare against drug trafficking networks in the region.

~ between

There has been ongoing warfare between the two neighboring countries for many years.