This is a bug in the game while playing as a russian in a campaign:
start playing the game and while the computer is playing
press M to get the menu, choose file, and save. (here is the
most important part - it will not be easy since the AI will be
attacking you, but it is possible to do while the AI is moving
his units) After saving, hit CTRL+ALT+DEL and close the game.
(You have to do it also a few times to exit) Now relaunch
the game, open your save game, and you will get a German player
turn but YOU will be playing instead of him. You should be able
to move the previously viewed units. Try to exhaust their moving
points and get closer to you or exposed for you units or make
them assault 1 by 1 a group of tanks of yours to get eliminated.
When you finish pass the turn and the AI will continue as usual
and give you the turn.