What caused the Battle of Berlin?

Related questions

1. What did JFK say in Berlin?
2. Is Berlin safe at night?
3. Is the Berlin Wall still there?
4. Why was a wall built in Berlin?
5. Is Berlin expensive to visit?
6. Is Berlin good place to live?
7. Does East Germany still exist?
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Tags

1. #berlin
2. #world
3. #europe
4. #adolf
5. #german
6. #hitler
7. #battle
8. #resulted
9. #during
10. #surrender
11. #major