The strength of Bolivar’s generalship lay in rapid and unexpected movements like this. The Spanish leaders, bound in the shackles of military routine, were astonished and dismayed by the forced marches of their enemies over roads that seemed unfit for the passage of an army. While they were manœuvring, calculating, hesitating, guarding the customary avenues of approach, Bolivar would surprise them by concentrating a superior force upon a point which they imagined safe from attack, and, by throwing them into confusion, would cut up their forces in detail. As a result, the actions of the patriot commander in the field seemed less impressive than those of less notable generals, but the sum of effects was far superior. Bolivar’s occupation of Tunja took the Spaniards by surprise. Barreiro, finding himself unexpectedly cut off from his centre of supplies, fell back upon Venta Quemada, where he was soon followed by his foe, anxious to deal a decisive blow before the royal forces could concentrate. Boyacá, the site now occupied by the hostile armies, was a wooded and mountainous country and one well suited to Bolivar’s characteristic tactics. Placing a large part of his troops in ambush and manœuvring so as to get his cavalry in the enemy’s rear, he advanced to the attack with a narrow front. On this Barreiro made a furious assault, forcing his opponents to recoil. But this retreat was only a stratagem, for, as they fell back, the Spaniards found themselves suddenly attacked in the flank by the ambushed troops, while the cavalry rode furiously upon their rear. In a few minutes they were surrounded, and the fierce attack threw them into utter confusion, in which the patriot army cut them down almost without resistance. General Barreiro was taken prisoner on the field of battle, throwing away his sword when he saw that escape was impossible, to save himself the mortification of surrendering it to General Bolivar. Colonel Ximenes, his second in command, was also taken, together with most of the officers and more than sixteen hundred men. All their artillery, ammunition, horses, etc., were captured, and a very small portion of the army escaped. Some of these fled before the battle was decided, but many of them were taken by the peasantry of the surrounding country and brought in as prisoners. The loss of the patriots was incredibly small,—only thirteen killed and fifty-three wounded.