hmmm, no...
I was stationed in the Netherlands (NL aka as Holland) for 7 years and went to lots of museums, but while over there, looked for military items, but was not into it, like I am now.
Battlefields I can help you with, but never found a lot of military 'stores".
Out of your way, but Bastonge is good, although the local museums are more fun to look through, they have all the items that were picked up by locals.
Overloon is in the middle of the NL and is the largest tank battle fought in NL, and they have a nice museum there too.
Regensburg (might be mispelling that) is a really nice, ancient walled city. Not too touristy and great to get up early in the morning and walk the wall around the city.
Ed