What type of atmosphere was the yalta conference held in?

The atmosphere was one of concern regrading European countries. The big three discussed how former Regions occupied by Germany during the war would be reintegrated into society. Ultimately, Stalin was put in charge of guiding free elections in the states of Germany, Czechoslovakia, Austria, Slovakia, Romania, Poland, etc. History tells us that the Soviets instead brought these nations under their sphere of influence and ignited the fear of communism spreading around the world initiating the Marshall Plan and Truman Doctrine providing Billions to countries in the Middle East and Europe to fight communism.