Sava game bug. I was able to run the single player missions (at least the first, so far) by disabling autosave in the mission definition.

1. I decompressed the map.pak file (it is a zip file) and deleted it, leaving only the decompressed directory inside ".local/share/Steam/steamapps/common/Men of War Assault Squad 2/resource".
2. I entered the directory "map/single/01_usa-skirmish/00b_usa-hurtgen/".
3. I edited the file "0.mi" (the mission definition) and I removed all the blocks named "x:autosave/xx" (from curly bracket to curly bracket).
4. The first USA mission because playable; you have to play it in one sitting, since autosave is disabled and normal save will crash the game.
5. Repeat the edit for the other missions to be able to play them.