Clan Sweeney supporters of the powerful MacDougall Lords of Lorne who supported John Balliol as patriots, as long as John was king of Scotland. After the murder of John Comyn, the nephew of Balliol, by Bruce in 1306, the First War of Scottish Independence became at one and the same time a civil war. The Balliol and Comyn parties taking the side of the English in opposition to Bruce, crowned Robert I of Scotland on 25 March 1306. This was an era of constantly shifting alliances, and in 1301 John MacSween was in alliance with Aonghus Óg Mac Domhnaill, Lord of Islay
Battle of Glen Trool most powerful men in Scotland, the previous year 1306. This led to a bitter civil war between the Bruce's faction and the Comyns and their allies, notably Edward I. After his defeat at the Battle of Methven and subsequently at the Battle of Dalry in the summer of 1306 the recently crowned King Robert was little better than a fugitive, disappearing altogether from the historical record for a number of months. It wasn't until the spring of 1307 that he made a reappearance, landing in the south-west of Scotland with soldiers recruited, for the most part, from the Western Isles.