Complex sentence: His son Edward II was defeated at the Battle of Bannockburn in 1314 and lost control of Scotland and was eventually deposed in a coup led by his wife Queen Isabella and Roger Mortimer.
Split into simpler sentences: His son Edward II was defeated at the Battle of Bannockburn in 1314 and lost control of Scotland. He was eventually deposed in a coup led by his wife Queen Isabella and Roger Mortimer.