as mentioned, anything veterans will most likely be phased out, partly due to the ambugiuous nature of the word, as mentioned already, is it wartime or wartime era veteran, or peace or war, etc.
the direction of wikitree categories is to place a person in the most specific one, i.e. do not add to wwII, and us navy. what we are attempting to do is create categories for the branch of service with sub categories for the units. then if the unit was engaged in a war, the war would be added to differentiate war and peacetime service. for example, going from broad to specific, we would have for peace time, based on what you know
United States Armed Forces (served their country)
United States Navy (was in the navy)
USS Missouri, United States Navy (served on the USS Missouri)
United States Armed Forces
United States Army
101st Airborne Division, United States Army
for wartime
World War II, United States of America
World War II, United States Navy
USS Missouri, United States Navy, World War II
World War II, United States of America
World War II, United States Army
101st Airborne Division, United States Army, World War II
if someone was in a "peacetime" unit following a war and just waiting for discharge, no need to add it as a category.
someone who was in WW II, Korea, Vietnam, each category would be added, and the units served in between those wars could be added if desired, or just noted in the profile biography