Battle of Castlebar

The Battle of Castlebar was a military engagement of the Irish Rebellion of 1798, which occurred on 27 August 1798 near the town of Castlebar, County Mayo. A combined force of approximately 800 French troops and 2,000 United Irishmen rebels, commanded by Jean Joseph Amable Humbert, routed a British Crown force numbering from 3,000 to 5,000 men, led by Gerard Lake, 1st Viscount Lake, in what would later become known as the "Castlebar Races" or "Races of Castlebar".

French soldiers and Irish rebels defeated British forces on 27 August 1798 near Castlebar, County Mayo. The victory briefly raised hopes for a successful French-Irish alliance against British rule but ultimately failed to alter the course of the 1798 Rebellion.