theatre of operations
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|Noun||1.||theatre of operations - a region in which active military operations are in progress; "the army was in the field awaiting action"; "he served in the Vietnam theater for three years"|
armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
theater of war, theatre of war - the entire land, sea, and air area that may become or is directly involved in war operations
region - a large indefinite location on the surface of the Earth; "penguins inhabit the polar regions"