Thank you, Ancestor.
I've got two things in mind with her. The first idea, is she's a Texan, going into the Guard after the war started, trained to operate AFVs, and wearing "liberated" Soviet headgear because she drives a captured BMP, like in the Soviet Vehicle Guide.
The other, is that she's Polish, and has hooked up with a NATO unit after the 5th Infantry disintegrated.