Tutukaka, Northland, New Zealand.
The closest US base to Paris is Ramstein Air Force Base in Germany, just west of Mannheim.
Pope AFB.
I believe it's Dover Air Force Base on Dover, Delaware.
The closest air force base to Jacksonville, Florida is the Jacksonville Air National Guard Base, also known as the Jacksonville International Airport Air National Guard Base. It is located at the Jacksonville International Airport.
Casey which is 3400kmsaway
The closest city or town to Mt. Hood is Government Camp, located at the base of the mountain.
It is the base/face of a certain shape, as in a square, it would be the bottom line(the one on/closest to the ground).
Australia house
I think Vilseck, 345 km
Aviano Air Base is the closest airport - however there are no commercial flights. Venice Marco Polo Airport is the closest commercial airport.
Quang Tri Base Camp, largest and last base camp closest to the DMZ.
Arnold AFB, TN is the closest active military installation although there are national guard and reserve activities in the immediate area.