Complex sentence: It sold a phenomenal 75,000 copies by the end of the year and created an international sensation, and was reprinted by "The New York Times" as America began its lengthy debate on entering what was then called "the European War".
Split into simpler sentences: It sold a phenomenal 75,000 copies by the end of the year and created an international sensation. The "New York Times" reprinted it as America began its lengthy debate on entering what was then called "the European War".