Complex sentence: In 1560 the MacLeods along with the Clan MacLean and Clan Mackay became part of the Gallowglass, a mixture of Gaels and Norsemen who became a ferocious mercenary army who successfully fought for Shane O'Neill in Ireland.
Split into simpler sentences: In 1560 the MacLeods along with the Clan MacLean and Clan Mackay became part of the Gallowglass. A mixture of Gaels and Norsemen who became a ferocious mercenary army who successfully fought for Shane O'Neill in Ireland.