1. How and why did Stalin tighten his control?
L/O: To explain how Stalin took over Eastern Europe
COMINFORM
Communist information Bureau
COMECON
Council for Mutual Economic Assistance

2. The Iron Curtain
“A shadow has fallen has upon the scenes so lately lighted by the allied victory. From Stettin to the Baltic an iron curtain has fallen. Beyond that line lie all the states of central and eastern Europe. The Communist parties have been raised far beyond their numbers and are seeking everywhere to obtain totalitarian control. This is certainly not the liberated Europe we sought to build. Nor is it one which allows permanent peace.” Winston Churchill speaking in the USA in 1946.

4. Source A
In this American cartoon from 1946, the thief labelled ‘Russia’ is caught stealing a bag labelled ‘territorial grabs’.  
He is being helped by Stalin, who is dressed like a policeman and holding a truncheon.  
Policeman Truman, from the 'World League Police Station' is too late  to stop him.