If you want to see something close to a WW II military museum or connected sites in Munich, then I recommend the aviation part of the Deutsches Museum, where you'll see some of the German war planes of the war, includung the first operational jet fighter and the relevant displays along the wall. Be advised what you see there as regards to the planes themselves on historical accuracy, they're "sanitized." You don't find that to be the case when you see German planes in England. German war planes from WW I are also featured.
Near the Odeonplatz is the site where the failed Nazi Putsch took place in 1923: the Feldherrnhalle. The problem with that site it has changed as to which statues are there now compared to what I saw in 1977.
If you read German, you can see the plaque (no English translation) acknowledging the liberation of the city of Munich by US troops, (ie, by Patch's Seventh Army), located on the wall (left side) as you go from the Marienplatz to the small courtyard. It's left of the Tourist Office am Marieplatz, if memory serves here, or, just ask at the Tourist Office where this plaque is located exactly.