To gain control of Eastern Europe following the second world war the Soviets used a variety of methods. Including:
P - Policies e.g. promises of land reform and reconstruction of a new post war society
A- Army - The Red Army remained throughout Eastern Europe
S - Support - Many communist parties had a degree public support
S - Salami Tactics - Political maoevering to create communist governments
E - Economic Policies - Comecon
D - Doctrine Berzehnev
C - Cominform - organisation to promote and support communism in other countries
L- Leaders - Politicans trained in the USSR were placed in Eastern European governments
I - Intevention - politically and militarially to maintain control
P -
These methods were used throughout the period to maintain control of Eastern Europe as well.