How many unknowns are in the Tomb of the Unknown and which wars were they from?

Answer:
The Tomb of the Unknown holds three soldiers, one each from WWI, WWII and Korea. The unknown soldier from Vietnam was later identified through DNA and was removed
First answer by Armoryhistorian. Last edit by Armoryhistorian. Contributor trust: 97 [recommend contributor recommended]. Question popularity: 2 [recommend question].