There is increasing tension between the king and his Protestant subjects. It comes to a head when James's queen gives birth to a son. This raises fears that England faces a succession of Roman Catholic rulers.
Several important noblemen write to William of Orange, the Protestant ruler of Holland, inviting him to bring an army to drive James out. William is married to James's daughter Mary.
Soon after William arrives, John Churchill, the king's best military commander, takes his forces over to his side. James and his wife and child leave for France.
The Duke of Schomberg, William's chief general, is one of many Huguenots fighting in William's army. Their presence has a propaganda value. It reminds the English what a Roman Catholic monarch might be capable of doing.