Q. In which year was the Berlin Wall erected?
Answer: 1961
Notes: The Berlin Wall was constructed in 1961, marking a significant moment in the Cold War. It was built to prevent East Germans from fleeing to West Berlin, symbolizing the ideological divide between the communist East and the democratic West. The wall stood until 1989, when it was dismantled, leading to the reunification of Germany. The Berlin Blockade in 1948 was a precursor to this division.