The phrase "broad territory" is correct and usable in written English.
You can use it to refer to a wide range of topics. For example, "John is an expert on a broad territory of legal matters."
That broad territory reveals no simple unity of geologic structure, landform, relief, or climate.
It was used across a very broad territory reaching from California to Alaska.
It is pretty enough, and it covers a broad territory: cooking, entertaining, wine, travel and chefs.
But the real argument, as Obama recognizes, takes place in that broad territory that lies behind the extremes of withdrawal and gung-ho crusading.
While Ms. Spark's books cover a broad territory of plot and character, some central similarities can be found in many of the novels and short stories.
British reality television is a broad territory about which few generalizations should probably be made, but sometimes it seems an awful lot as if Henry Higgins ought to receive a producing credit.
Sue Garner and Rick Brown have been mainstays of New York's avant-rock, touching on punk, country and broad territories in and around them.
This work illustrates the application of a simulation model to analyse how swiftly large-scale land-use changes can drive broad territories to collapse.
It almost goes without saying, for instance, that urbanization takes place in a broader territory.
Instead of focussing his attention on Medina, he should wage war over the broadest territory possible.
Instead of trying to do the broader territory and the narrow focus, they should have stuck with the narrow option.
