Playing Allies against the computer (standard difficulty level) I succesfully tested following strategy:
- holding Poland as long as possible, outmaneurving Germans, cutting their supply by the Poles
- 2nd turn invasion of Low Countries: Germans are initially economically weak and they loose valuable early plunder. GB was able to buy HQ to suppor air force. The invasion was performed by 2 carriers, 3 air fleets including malta, strategic bombers, 3 french armies, 1 british corps which landed in capital
- holding line and using air force to occassionaly eliminate some german units succeded in dramatic lowering of german offensive power
- landing in southern italy into unprotected city
- buying hq by the french
- finally after one year of stalemate final counteroffensive
- ussr joins which means the end of the game