With World War II imminent in Europe, Amfitheatrof elected to remain in the United States. He relocated his family to California on the recommendation of Boris Morros, then director of music at Paramount Pictures.
Amfitheatrof's choice was influenced by the impending war in Europe. He decided to remain in the U.S. and move his family to California, with the advice of Boris Morros, who was in charge of music at a prominent picture studio.