On July 16, 1922, Free State forces under General Dan Hogan storm Dundalk Gaol in County Louth, capturing Frank Aiken, the Chief of Staff of the Anti-Treaty Irish Republican Army (IRA), and a large number of his men from the Fourth Northern Division. This is part of a broader Free State military campaign to suppress anti-Treaty resistance following the Anglo-Irish Treaty and the establishment of the Irish Free State.

The Irish Civil War (June 1922–May 1923) pits pro-Treaty Free State forces against anti-Treaty IRA units who oppose the Treaty’s terms. Aiken is a key republican commander, and Dundalk is a stronghold for his forces. By mid-July 1922, Free State troops have taken several towns, and Dundalk is next in line for reoccupation.

General Hogan’s forces enter Dundalk, engaging republican snipers and irregulars. The attack targets the Gaol, where Aiken and many of his men are held. The Free State troops overpower the defenders, leading to Aiken’s arrest and the capture of a significant portion of the Fourth Northern Division.

Aiken and about 104 other prisoners escape on July 27, 1922, through a narrow gap in the jail wall, later dubbed the “Hole in the Wall.” This escape is a major republican success, temporarily reoccupying Dundalk. However, Free State forces retake the town on August 14, 1922, and the jail remains under military control until 1924.

The capture is significant as it marks a turning point in the Free State’s campaign in County Louth, weakening republican resistance in the area. Aiken’s arrest underscores the Free State’s determination to dismantle anti-Treaty leadership. The events in Dundalk become a symbol of republican resilience, as the escape through the “Hole in the Wall” is widely reported and commemorated.

In summary, the July 16, 1922, capture of Frank Aiken in Dundalk is a decisive Free State action in the Irish Civil War, leading to a notable republican escape and a prolonged military standoff in the town.

(Pictured: Frank Aiken and the 4th Northern Division)