 Grayzel gives a number of 550,000 Jews in military service in the United States during World War II out of a total population of 4,770,000 American Jews.Major General Maurice Rose (November 26, 1899 – March 30, 1945) was a United States Army general during World War II and World War I veteran.The son and grandson of rabbis, General Rose was at the time the highest ranking Jew in the U.S. Army.