Complex sentence: Following World War II, the British Empire superpower status transferred to the United States; the United States and the Soviet Union came to be generally regarded as the two superpowers, and confronted each other in the Cold War.
Split into simpler sentences: Following World War II, the British Empire superpower status transferred to the United States. Post World War II phase, the United States and the Soviet Union came to be generally regarded as the two superpowers, and confronted each other in the Cold War.