Complex sentence: When Berlin falls to the Soviets and her husband is killed, she flees to the United States carrying his unborn child, not giving up hope that she will find her family, which is tied together by her mother's ring.
Split into simpler sentences: When Berlin falls to the Russians, and her husband is killed, she flees to the United States, carrying her unborn child. All the while, she does not giving up hope that she will find her family, tied together by her mother's ring.