Complex sentence: ' He is best remembered for his role in the 1745 Rebellion; defeat at Culloden in April 1746 effectively ended the Stuart cause and subsequent attempts such as a planned French invasion in 1759 failed to materialise.
Split into simpler sentences: ' He is best remembered for his role in the 1745 Rebellion which ended with defeat at Culloden in April 1746. This effectively ended the Stuart cause and subsequent attempts such as a planned French invasion in 1759 failed to materialise.