The Tercio de Montserrat in the capture of Codo Historical milestone · Codo, Campo de Belchite, Zaragoza On 24 August 1937 the Tercio de Montserrat, a unit of requetés mostly Catalan, held out at Codo against the Republican advance towards Belchite. Of some one hundred and eighty combatants more than one hundred and forty died, and on Christmas Eve the residents were evacuated in lorries. 1937 Photo: Dd1495 (CC0) What to see and do in Codo