Complex sentence: In November 1316, he was appointed Lord Lieutenant of Ireland, and in 1322, he was imprisoned in the Tower of London for having led the Marcher lords in a revolt against King Edward II in what became known as the Despenser War.
Split into simpler sentences: In November 1316, he was appointed Lord Lieutenant of Ireland. He was imprisoned in the Tower of London in 1322 for having led the Marcher lords in a revolt against King Edward II what became known as the Despenser War.