The units took position along the course of the Tordera River east of the Montseny Massif on 27 January. But the effort proved futile and in practice it became impossible for the Republican forces to put up any meaningful resistance. The young, inexperienced and ill-equipped 242rd Mixed Brigade —posted at the lower course of the river— was unfit for the battle. At the onset of the fight it quickly fell into disarray and was overrun.