Montrose's army spent a cold night in the open on the side of Ben Nevis. Argyll was already aware that a small force was operating in the area, having been alerted by pickets driven from Keppoch by the Royalist advance guard. He did not know, however, that he was faced by the entire royal army. Just before dawn on 2 February 1645, Argyll and his commanders were dismayed at the sight that lay before them. As far as they were aware Montrose should still have been 30 miles north.
Order of Battle and deployments •
Royalist (
James Graham, 1st Marquess of Montrose) • Irish Brigade Alasdair Mac Colla • Thomas Laghtnan's Regiment (400 men) • Manus O'Cahan's Regiment (200) • James McDonnell's Regiment (200) •
MacDonald,
Cameron and other clan levies (c.500) • Patrick Graham of Inchbrackie's Regiment (200) • Sir Thomas Ogilvie's Horse (50) •
Covenanter (
Sir Duncan Campbell, 2nd Baronet of Auchinbreck) • Marquess of Argyll's Regiment (500) •
Clan Campbell levies (c.1000) • Lt-Col Laghlan Roughe's Battalion (200) • Lt-Col
John Cockburn's Battalion (200) Argyll did not stay for the battle, having injured his arm in a fall from his horse, and retired to his galley anchored on
Loch Linnhe. Command of the government forces was left in the hands of his kinsman Sir Duncan Campbell of Auchinbreck, described by
Robert Baillie as "a stout soldier, but a very vicious man". Auchinbreck was an experienced veteran recently recalled from the war in Ireland and regarded as the best soldier in Clan Campbell. Auchinbreck lined up his forces with the left wing anchored on Inverlochy Castle, which he reinforced with 200 musketeers to protect his left flank. In the centre he placed Argyll's regiment, with an advance guard commanded by Gillespie, son of the Laird of Bingingeahds. On the flanks he put the 8 companies of Lowland militia sent by Baillie, under Roughe and Cockburn, while to the rear was a reserve of Campbell clan levies commanded by the lairds of Lochnell and Rarra, along with two light artillery pieces. Unlike at
Tippermuir and
Aberdeen, where Montrose had annihilated hastily
conscripted and poorly trained
militias, many of the troops he faced at Inverlochy were veterans of the wars in England and Ireland. Montrose lined his army up only two lines deep to avoid being outflanked, placing the clansmen, under his personal command, in the centre with the Irish on the flanks, the left being commanded by
MacColla and the right by O'Cahan. A small troop of light cavalry, led by Sir Thomas Ogilvie of Airlie, protected the Royalist
standard.
Attack by Montrose The fight did not start straight away and instead skirmishes broke out along the line before dawn. This was possibly because Montrose wanted to harry Argyll's men to ensure they did not slip away, whilst hiding his own presence and the full size of his army. Auchinbreck and his officers thought that they were only fighting one of Montrose's lieutenants and not the man himself, believing he was still far up the glen. Wishart, Montrose's biographer, claimed that they only realised Montrose and his cavalry were present on hearing trumpets used as the attack signal. Just before first light, the Royalists launched their attack. O'Cahan's men advanced first, followed by Mac Colla. The Irish closed rapidly and violently with the regular troops on both flanks. Montrose, in his letter describing the battle, stated that they went quickly to "
push of pike and dint of sword". The Irish routed the two wings, exposing Auchinbreck's centre. Montrose then launched the highlanders at Argyll's regiment and the Campbell clansmen; as the first line was driven back on to the second, the latter panicked and broke. Some of the Lowland foot forming Auchinbreck's left attempted to retreat into the castle, but were blocked by the Royalist cavalry under Ogilvie and driven to the shore of the loch. Auchinbreck was shot in the thigh while trying to rally his men and died shortly afterwards. The remaining Covenanters briefly rallied around their standard, then broke and ran. The battle rapidly became a "massacre perpetrated by one set of feuding clansmen on another". Those who ran towards the loch were slaughtered, while the remainder attempted to escape into the hills. The small garrison in Inverlochy castle surrendered without a fight. As was common in the battles of the era, the majority of casualties occurred during the rout of the retreating forces, who were pursued at least eight miles from the battlefield. In later years the graves of many of them were pointed out in
Glen Nevis. Over 1500 Covenanter troops died, while Montrose lost very few men, reputedly as few as between four and eight, the most notable Royalist casualty being Sir Thomas Ogilvie who was hit by a stray bullet and died several days later. Many gentry and
tacksmen serving under Argyll were killed, including John Campbell of Lochnell, Colin MacDougal of Rarra, and others. The remaining officers were all captured, although some, such as Cockburn, were shortly released on parole on the promise that they did not take up arms against the Royalists.
Iain Lom, the bard of the clan
MacDonald of Keppoch, watched the battle from a vantage point on a hillside, and afterwards wrote the poem "Là Inbhir Lochaidh" ("The Day of Inverlochy") about it. ==Aftermath==