Yes there are requirements for moving on in the campaign

[jedsuspect]

So in my case I was stuck after the first 3 scenarios from the Soviet side and although I won them I didn't win Little Saturn good enough to advance (it takes a decisive victory). The info as far as I know is not in the briefings but shows up when you put your pointer over the scenario name down on the bottom right of the Campaign map. Just posting this for those wondering who like me didn't want to much info while searching for a solution of the problem (found it in the tech forum at UOC's main forums).

[XTwo]

Indeed, in the Axis - Stalingrad scenario, you get 24 turns and I captured the city on the last turn with my last unit: captured the city on the last turn with my last unit but it didn't even count. Don't know why the turn limit is at 24 there when the latest you can get a Decisive Victory (which is required to progress) is at 18 turns.

[jedsuspect]

I posted this on nov 30..just in case someone else was as dumb as I had been at first. Appreciate your post though. Thanks. :)

[jedsuspect]

I continued on and finished the soviet campaign ..haven't played since but I imagine I will go back and do the axis side one day. :)