Complex sentence: In the battle many Scots deserted, and the remaining Scots were decisively defeated by the well disciplined New Model Army of the English, and amongst the slain was "Allan Macquarrie of Ulva", chief of Clan MacQuarrie, and most of his followers.
Split into simpler sentences: In the battle many Scots deserted, and the remaining Scots were decisively defeated by the well disciplined New Model Army of the English. Amongst the slain was "Allan Macquarrie of Ulva", chief of Clan MacQuarrie, and most of his followers.