In Slovakia are 3 museums which I can recommend:
1.) "Múzeum dopravy" (Museum of transport) where are cars, locomotives, motocycles and military vehicles - NSU Kettenkraftrad, BMW R-75 + sidecar, Schwimmwagen, Goliath, Wyllis.
2.) "Múzeum SNP" (Museum of Slovak National Uprising)-
weapons, uniforms, StuG III, PZ IV, SdkFz 250 + soviet tanks and artillery and airplane Lisunov 2.
3.) museum od Dukla operation - soviet tanks, artillery and some german vehicles, but I never be there.
4.) and last museum of military technik in Piešťany town. But there are only Czechoslovak and Russian military technik which made after WW2.