William was the only child of William II, Prince of Orange, who died a week before his birth, and Mary, Princess of Orange, the daughter of King Charles I of England, Scotland, and Ireland. In 1677, during the reign of his uncle King Charles II of England, Scotland, and Ireland, he married his cousin Mary, the fifteen-year-old daughter of his maternal uncle James, Duke of York. A Protestant, William participated in several wars against the powerful Catholic King Louis XIV of France, in coalition with both Protestant and Catholic powers in Europe. Many Protestants heralded him as a champion of their faith. In 1685, his Catholic uncle and father-in-law, James, became king of England, Scotland, and Ireland. James's reign was unpopular with the Protestant majority in Britain, who feared a revival of Catholicism. Supported by a group of influential British political and religious leaders, William invaded England in what became known as the Glorious Revolution. In 1688, he landed at the south-western English port of Brixham. Shortly afterwards, James was deposed.