Would world war be capitalized

Answer 1

If you are naming a specific war such as World War I, World War II, or the Vietnam War, than yes, you capitalize the names of the war.

If you are simply using war or world war as a regular noun and not naming a specific one, than no, you do not capitalize it.

Example sentence:

The world war #1(noun no capitals) has a proper name of World War I (including the roman numerals).