'war theatre' is correct and usable in written English.
You can use it when referring to a place where wars are taking place, or when talking generally about war in terms of a form of entertainment. For example: "The war theatre in Syria has been devastating for years, with little hope of resolution in sight."
During the cold war, theatre learned to love the bomb and its moral complexities, in plays such as Sir Tom Stoppard's "Hapgood" and Michael Frayn's "Copenhagen".
Such an "extreme measure" could be justified because "the entire area is a war theatre", Odinkalu said.
There were also the less well-known, but equally interesting, The Genius Of The German Theatre (1968) and The War Theatre Of Europe (1970).
Russian newspaper readers feeling down about the navy were able to console themselves, however, with a bit of cold war theatre.
In 1963, aged sixteen, I was taken by my father to see Oh What a Lovely War, Theatre Workshop's musical entertainment about the First World War.
Other grisly practices, such as cross burnings, were uprooted from Alabama and Mississippi to the war theatre of Vietnam, and some commanders tolerated Ku Klux Klan "klaverns" on their bases.
Oh! What a Lovely War Theatre-maker Joan Littlewood was a visionary, an iconoclast and a subversive.
But I also share your belief that weapons that were designed for soldiers in war theatres don't belong on our streets.
The vividness surely derives from Aldiss's own youthful experiences; he served in the chaotic second world war theatres of Borneo and Sumatra.
In 2008, a Defense Science Board Task Force studied the Pentagon's use of energy and how its dependence on costly (in lives and budgets) convoys hauling gasoline and jet fuel in war theatres might be reduced.
Obama has said he'd support legislation which reinstated the ban – "weapons that were designed for soldiers in war theatres don't belong on our streets", he said at a presidential debate in 2012.
