On the night of July 25-26, the unit concentrated to the east of the town of Móra la Nova. The next day the brigade crossed the Ebro through the Ribarroja-Fayón sector, reaching the line that ran from Els Auts, the road junction from Maella to Fraga and the mouth of the Matarraña river. However, on August 6 it had to abandon the so-called "Fayón-Mequinenza pocket" and return to the other shore. Compared to the other brigades of the division (226th and 227th), the 59th MB was the one that had suffered the least amount of attrition. After undergoing a reorganization, around September 14 it returned to the front line and relieved troops from the 3rd Division in the Sierra de Cavalls. Between October 8 and 20 it faced sustained enemy assaults, having to abandon its positions; after the front was broken, on November 5, the 59th MB lost the town of Miravet and two days later it had to withdraw from Móra d'Ebre. Finally, on November 12, it would cross the river again.