However, the enemy, apprised of the coming offensive, has prepared to ambush the Republicans in force and it seems unlikely that blowing up the bridge will do much to prevent a rout. Regardless, Jordan understands that he must still demolish the bridge in an attempt to prevent fascist reinforcements from overwhelming his allies. Lacking the equipment destroyed by Pablo, Jordan and Anselmo improvise an alternative method to explode the dynamite by using hand grenades. Jordan attaches wires to the grenades so that their pins can be pulled from a distance. This improvised plan is considerably more dangerous than using conventional detonators, because the men must increase their proximity to the explosion.