I had cause to visit this small museum, which is actually a private collection displayed by two people.

It has a large array of military items covering POWs from the nearby Bergen-Belsen concentration camp, (which also has a museum), and many items from the 50s till now.
WWII German
East German

The museum is at the moment housed in the basement of a former Germany barrack block, but will shortly be moving 50m to another building where they will have more space.

well worth a visit, even if it's to their web site www.fallingbostelmilitarymuseum.de It is in both English and German.