You have arrived at a place to think, about things to be seen and put them in sync. The puzzle you’re trying to solve, may require your thoughts to evolve. Multiple answers can be found, if you simply dig around. It’s really quite hard to explain, but that’s why you were born with a brain.
N39 A.B W104 C.D
A = Warsaw Pact 19_ _
B =
C = 19 _ _
D = 723
You can check your answers for this puzzle on GeoChecker.com.