I'm interested in the relations between the West and the USSR in the years immediately after WW2. The impression I have is that the relationship drastically chilled virtually as soon as Germany surrendered, with the Berlin Blockade, etc, coming along just a few years later. Was the shift from allies to enemies really so drastic, or did the semi-amicable wartime relationship continue for a while?
Relations were pretty chilly even before Germany surrendered, they were already keeping each other at arms length - look at the scramble to grab rocket engineers and technology as the allies got further and further in to Germany.
The USA/UK/Russia had different aims and only really joined together to defeat the Nazis. I found an article that goes in to more depth: http://www.pbs.org/behindcloseddoors/in-depth/uneasy-allies.html