In this glacial region the provisions brought with them gave out. The cattle on which they had depended as their chief resource could go no farther. Thus, dragging on through perils and privation, at length they reached the summit of the Paya pass, a natural stronghold where a battalion would have been able to hold a regiment in check. An outpost of three hundred men occupied it, but these were easily dispersed by Santander, who led the van.
At this point the men, worn out by the difficulties of the way, began to murmur. Bolivar called a council of war and told its members that there were greater difficulties still to surmount. He asked if they would keep on, or if they preferred to return. They all voted in favor of going onward, and the knowledge of their decision inspired the weary troops with new spirit.
Before the terrible passage was completed one hundred men had died of cold, fifty of them being Englishmen. Not a horse was left, and it was necessary to abandon the spare arms, and even some of those borne by the soldiers. It was little more than the skeleton of an army that at length reached the beautiful valley of Sagamoso, in the heart of the province of Tunja, on the 6th of July, 1819. Resting at this point, Bolivar sent back assistance to the stragglers who still lingered on the road, and despatched parties to collect horses and communicate with the few guerillas who roamed about that region.
Barreiro, the Spanish commander, held the Tunja province with two thousand infantry and four hundred horse. There was also a reserve of one thousand troops at Bogota, the capital, and detachments elsewhere, while there was another royalist army at Quito. Bolivar trusted to surprise and to the support of the people to overcome these odds, and he succeeded in the first, for Barreiro was ignorant of his arrival, and supposed the passage of the Cordillera impossible at that season of the year.
He was soon aware, however, that the patriots had achieved this impossible thing and were in his close vicinity, and with all haste collected his forces and took possession of the heights above the plain of Vargas. By this movement he interposed between the patriots and the town of Tunja, which, as attached to the cause of liberty, Bolivar was anxious to occupy. It was not long, therefore, before the opposing armies met, and a battle took place that lasted five hours. The patriots won, chiefly by the aid of the English infantry, led by Colonel James Rooke, who had the misfortune to lose an arm in the engagement.