In this context alliance would mean to come to a formal agreement to help each other.
Answer: Obama received national attention in 2004 with his March Senate primary win, his well-received July Democratic National Convention keynote address, and his landslide November election to the Senate.
The correct answer is "an area of Soviet-aligned nations following WWII."
This is evident from the map based on the information provided in the key. In the key it states that the purple area symbolizes "Socialist FR of Yugoslavia: USSR aligned until 1948." Considering that World War II ends in 1944, this shows that this area was indeed aligned with the Soviet Union after World War II.
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