14 September 1837,
Liberal armies and Carlists fought for the battle of Andoain. When Liberal General O’Donnell attacked Hernani and Urnieta, the Carlists took refuge across the Oria, in the Andoain area. Liberals committed violent attacks along with the British Legion to dominate these positions and burned more than 120 charities. After several days of equal combat, the Carlists suffered an attack today and the Liberals had to go back to San Sebastian. Many farmers who were left homeless joined the Carlists and, wanting revenge, killed the prisoners. Corpses of some 620 liberals were found on the battlefield.