Shalom, There are many prophesies that have been fulfilled. These prophesies can be found in the Torah, Tanach and the Holy book of Zohar. The terrible holocaust was prophesied in the book of Devarim (Deuteronomy) 31, 16-18 (דברים לא, טז-יח) and there are many more other prophesies that have been fulfilled, which will be hard to write them all here. If you want, in my book about the coming of Moshiach I have wrote a lot of prophesies that have been fulfilled with their sources. You can purchase the book on this page www.atzmut.com/product/are-you-ready-book All the best, Rabbi Alon Anava