During the war they were called provinces; they'd be outlined on a map, if you obtain one.
your period
C
A small area map.
look for the map legend or key ON THE MAP
anything
I think it is Vietnam
Where is a map of Indochina
The blue area
yes, that is why "Vietnam" exists, check out a map sometime, they're actually useful.
mountain ranges
Asia. Near the ocean. It has the shape of "S"