An even deeper division set in during the English Reformation, when most of England converted to Protestantism and France remained Roman Catholic. This enabled each side to see the other as not only a foreign evil but also a heretical one. In both countries there was intense civil religious conflict. Because of the oppression by Roman Catholic King Louis XIII of France, many Protestant Huguenots fled to England. Similarly, many Catholics fled from England to France. Scotland had a very close relationship with France in the 16th century, with intermarriage at the highest level.