Battle of Aberdeen (1644)

The battle of Aberdeen occurred during the Wars of the Three Kingdoms on September 13th, 1644, when Scotland's Covenanter government allied with the English Parliament against King Charles I. Charles I appointed the Marquess of Montrose to lead a diversionary Royalist campaign in Scotland to draw Covenanter armies away from the English fronts.

The Marquess of Montrose

Montrose’s forces, mainly composed of local highlanders and a disciplined Irish brigade led by Alasdair MacColla, played a crucial role in the campaign. After their victory at Tippermuir on 1 September, Montrose advanced north to seize supplies and secure the region, highlighting the strategic importance of his troops.

Upon arriving outside Aberdeen, Montrose issued a standard summons demanding the city's surrender and advising civilians, women, and children to evacuate if they chose to resist. The town's magistrates rejected the ultimatum.

As the Royalist messenger party returned to their lines, a Covenanter soldier broke the rules of war by firing upon them, killing Montrose's young drummer boy. Infuriated by this flagrant breach of truce, an enraged Montrose ordered an immediate, merciless assault and promised his troops the plunder of the city.

The Covenanter forces, numbering around 2,000–2,500 infantry and several hundred cavalry, were positioned along a steep ridge at Justice Mills. Notably, about half of their force consisted of inexperienced local levies and reluctant militia, which affected their resilience.

Montrose launched an aggressive, fast attack. The Covenanter lines quickly crumbled under the pressure of the veteran Irish and Highland troops. The defensive lines dissolved into a chaotic rout, with fleeing soldiers chased through the streets of the burgh, highlighting the battle's violent nature.

While the formal battle lasted only about two hours, the subsequent three-to-four-day campaign of violence, initiated by Montrose's entry into Aberdeen, had lasting repercussions. Montrose either lost control of his forces or chose not to intervene immediately, leading to widespread destruction.