In this historical context, a substantial migration of conversos from the Iberian Peninsula to Amsterdam took place from the 1600s to the early 1800s. Once in Amsterdam, many returned to Judaism openly and publicly. They called themselves Portuguese Jews, even those who came directly from Spain. They wanted to avoid being identified with Spain, which was at war with the Dutch Republic at the time during the Eighty Years' War. This branch of Judaism is also known as the Western Sephardim.