Complex sentence: The Battle of Lochmaben Fair was fought on 22 July, 1484: a force of 500 light horsemen led by Alexander Stewart, Duke of Albany and James Douglas, 9th Earl of Douglas invaded Scotland, but were defeated.
Split into simpler sentences: The Battle of Lochmaben Fair was fought on 22 July, 1484. A force of 500 light horsemen led by Alexander Stewart, Duke of Albany and James Douglas, 9th Earl of Douglas invaded Scotland, but were defeated.