Complex sentence: One of the first was the Battle of Drumlui in 1337 in which a dispute arose between the Clan Mackintosh and Clan Cameron over land at Glenlui and Loch Arkaig.
Split into simpler sentences: One of the first was the Battle of Drumlui in 1337. A dispute arose between the Clan Mackintosh and Clan Cameron over land at Glenlui and Loch Arkaig.