The curve of the Ebro between Fayón and Cherta was the sector chosen for the main assault, with XV Corps on the right and V Corps on the left. Two subsidiary actions were added–the 42nd Division crossing to the north, between Fayón and Mequinenza in order to impede a counter-attack from the right flank, and the French XIV International Brigade crossing downriver at Amposta. The total strength of the assault force was about 80,000 men.3
The greatest weakness was in artillery as a result of losses in Aragón. The whole army had no more than 150 guns, some of which dated from the last century. In addition, the 76mm anti-aircraft ammunition was known to be defective, although the soldiers were not informed ‘for reasons of morale’.4The nationalist troops facing them from the right bank of the Ebro consisted of the 50th Division commanded by Colonel Luis Campos Guereta, who had his headquarters in Gandesa, Barrón’s 13th Division in reserve and the 105th Division, which covered the front from Cherta to the sea.5
These divisions of Yagüe’s Moroccan Corps consisted of about 40,000 men. Over the last few days before the republican attack, Colonel Campos passed back intelligence reports to Yagüe, warning that his men had observed troop movements and preparations on the opposite bank of the Ebro. These observations were confirmed by air reconnaissance, but the nationalist high command did not take the threat seriously. It seemed unthinkable to them that the republican army, which had been so severely mauled in Aragón, would be ready to undertake any sort of offensive, especially one across a broad river.On 24 June Colonel Franco-Salgado, the Generalissimo’s aide, had been informed that the republicans were preparing rafts to cross the river as well as pontoon bridges, and that the majority of the International Brigades were concentrated in Falset.6
This intelligence was confirmed by the interrogation of deserters and prisoners, but Franco did no more than tell Yagüe to maintain a state of alert.7The crossing of the Ebro was prepared in minute detail for a whole week, with the republican troops practising in ravines, rivers and on the coast. The engineer corps mocked up the crossing with bridges built in Barcelona or bought in France. Meanwhile, reconnaissance troops from the specialist XIV Corps of commandos slipped across the river at night. They made contact with peasants on the other side to obtain information on nationalist positions. The seventeen-year-old Rubén Ruiz, the son of La Pasionaria, was one of them. He was finally killed as a major in the Red Army in 1942 during the retreat into Stalingrad.
In the very early hours of 25 July commandos went across silently and knifed the sentries on the far bank. They also fastened lines for the assault boats to follow. Six republican divisions then began to cross the Ebro, with the point units in assault boats, guided by local peasants who knew the river. The bulk of the forces followed using twelve different pontoon bridges set up by the engineers. Above Fayón, the 226th Brigade from the 42nd Division cut the road from Mequinenza, and the rest of XV Corps crossed the river at Ribarroja and Flix to establish a bridgehead along the line of Ascó–La Fatarella. At the same time V Corps crossed near Miravet to take Corbera d’Ebre on their line of advance to Gandesa, and also near Benissanet to attack Móra d’Ebre and link up with the flank units of XV Corps.
Much further downriver, almost on the sea, XIV International Brigade tried to cross the river, but only a small number reached the other shore alive. The Riffian Rifles of the 105th Division inflicted heavy casualties. XIV International Brigade lost 1,200 men in 24 hours, shot or drowned. Pierre Landrieu of the Henri Barbusse Battalion, recorded that it was not possible to cross the river to help their comrades trapped on the far bank, who yelled for help in vain.8
In the centre the republican troops advanced rapidly and captured some 4,000 men from the 50th Division. On the following day they approached Vilalba dels Arcs and Gandesa, after occupying Puig de L’A