Also if the game and or patch does not work, it could be where you downloaded the game from, I downloaded from:
https://panzergeneraldownload.com/peoples-general.html
And a lot of files were missing, the game didn't work and when I started a scenario or campaign the map wouldn't appear and instead would be a black screen, the dialogue and turn notification that came up would freeze to the screen, If you fix this by using compatibility settings via windows 98 the units will move slow, if you use the patch it will make the game crash on start up. (Note original Panzer General and Allied General work fine from this website).
The full game download and patch from:
http://www.peoplesgeneral.de/
Completely fixed this issue, as all files were included in above installation.