For the crossing, the Republicans chose the bend of the Ebro River between Fayon and Benifallet, an area held by the 50th Division of the Nationalist Army. The Republican army started the crossing on the night of 24–25 July during a no moon period. Republican commandos crossed the river, killed the Nationalist guards and fastened lines for the assault boats, then the first Republican troops crossed in ninety boats (each of which carried ten men). The remaining troops of the V and XV Corps crossed the next day, using three pontoon bridges and another 12. The surprise was total and Republican forces were initially successful. Nevertheless, a secondary assault near Amposta, carried out by the XIV International Brigade, failed after 18 hours of combat, and the XIV International Brigade retreated, after suffering huge losses.