All of these Tanks and Tank Destroyer share something in common. Once you learn what that piece in common is, you will then crack the code. As always the cache is not at the listed coordinates.
During the day it is crowded so stealth will be a must.
N 37° 07.ABC W 076° 32.DEF
A. M6 Heavy Tank

B.Panzerkampfwagen 38(t)

C. Kliment Voroshilov tank (KV-1)

D. T-60 Light Tank

E. Jagdpanther

F. FV214 Conqueror
