I think I saw "Kanal" some years back, on a foreign movie channel, but I think that one dealt with the Uprising near the end of WWII.
Pretty harrowing. I remember a scene near the end, where the freedom fighters were in a sewer being chased by the Nazis. They got to the outfall, only to find steel bars or mesh blocking their way.
You might try some of the foreign video sites on the Web.