Soviet BuildingMailbag Order
The Main Part of the Soviet is to CY fast Follow this building order and you should be fine and you will CY very fast.
#1- Construct Your CY (Construction Yard)
#2- Small Power Plant
#3- Small Power Plant
#4- Barracks (Build guys until your Ore Refinery is done)
#5- Ore Refinery
#6- War Factory (Get 1 more ore truck NO TANKS!)
#7- Service Depot
#8- War Factory
#9- War Factory
Then once you are done with this you may do what you want. Just remember you are suppose to have fun with this game too.