Simplify the following text for a Grade 7 native English-speaking person.
Original: Churchill 's role in defeating the Monmouth Rebellion in 1685 helped secure James on the throne , yet just three years later he abandoned his Catholic patron for the Protestant Dutchman , William of Orange .
Simplified: Churchill helped secure James on the throne . However , just three years later he left his Catholic teacher for the Protestant Dutchman , William of Orange .