Final answer:
The plan to divide Germany into occupation zones backfired for the US, France, and Great Britain in multiple ways, including the establishment of two German nations, the Soviet blockade of West Berlin, and the difficulty in coordinating efforts.
Step-by-step explanation:
The plan to divide Germany into four occupation zones between the US, France, Great Britain, and the Soviet Union backfired for the US, France, and Great Britain in several ways. Firstly, it led to the establishment of two German nations - West Germany in the western zones and East Germany in the Soviet zone. This division further deepened the divide between the East and West during the Cold War. Secondly, the Soviet Union's blockade of West Berlin in 1948 highlighted the limited influence of the Western powers and their inability to prevent Soviet aggression. Lastly, the division of Germany made it difficult for the Western powers to coordinate their efforts and establish a unified and prosperous Germany.