The lieutenant and Fletcher approach the house and are seen from behind standing on a well-tended lawn. The front shot shows them standing on uneven ground with tall straggly weeds.
When Mac looks from the raft to the house, there are no people in front of it. However. the close shot shows four guards.
At the 31:00 mark, Sidney brings some water in his cupped hands for The Girl to drink. The next shot after she has finished drinking shows Sidney's hands to be completely dry.
There is a multitude of different uniforms here. they are wearing german helmets, camo with american nco stripes. It looks like someone went through the movie prop department and put together a bunch of uniforms out of spare parts.
The shots of the dead girl show her either with her face three-quarter turned to the ground (close shot) or with her face looking straight out to the side (long shot). This may be deliberate due to the surreal nature of the scene, namely the mental state of her killer.
After the Girl is shot dead, she can be seen breathing while laying on the ground.
One of the enemy soldiers that's been "killed" in the house can be seen laying face up & still breathing.
A girl is taken captive and tied to a tree with two of the soldiers' belts. However, in one scene her right wrist is clearly untied and the actress is simply holding her arms to the tree pretending to be bound.
Our heroes steal a plane from an enemy military base. However the plane (a Luscombe 8) is clearly a civilian airplane with no military markings whatsoever. It is unlikely an obvious civilian aircraft like this would be on a military base.