The llaneros were not professional soldiers. They were plainsmen, cowboys of the vast Venezuelan and Colombian grasslands who lived on horseback and handled lances the way other men handled tools. Paez himself had grown up among them, a man of the llanos before he became a general. In April 1819, Simon Bolivar arrived at the Arauca River to find Paez's cavalry division encamped on the southern bank. Together their combined forces numbered roughly 3,000 men. Across the river, at a ranch called Las Queseras del Medio, Spanish General Pablo Morillo commanded 6,000 troops. The odds were bleak, but Paez had something Morillo could not match: riders who knew the savannah the way a sailor knows currents.

Paez selected 153 of his best lancers and swam their horses across the Arauca River to a point two miles upstream of Morillo's camp. Once across, he divided them into six or seven platoons and advanced into open grassland. Morillo responded with overwhelming force: 800 lancers and 200 carbine-armed cavalry in the vanguard, with infantry and artillery behind. The Spanish general ordered a charge. Paez turned and ran. It looked like a rout. His horsemen galloped toward the position of one of Bolivar's infantry units, drawing the Spanish cavalry deeper into pursuit. Morillo's flanking columns spread wide, trying to encircle the fleeing llaneros. Paez then sent a platoon to strike at the Spanish center, a feint designed to force the two flanking wings to converge.

The maneuver worked with devastating precision. As the Spanish cavalry compressed into a disorganized mass, Paez wheeled around and gave his famous order. Every llanero reversed direction and charged directly into the confused enemy. The effect was immediate and catastrophic. Spanish soldiers who moments before had been pursuing a broken force suddenly found themselves facing a wall of lances coming at full gallop. Panic rippled through the royalist ranks. The cavalry broke and fled, leaving 400 dead on the plains. Paez lost eight men. The disparity speaks to the chaos that a well-timed reversal can inflict: soldiers running forward are psychologically unprepared to be attacked from the direction they are running toward.

One of the lancers who charged that day was Pedro Camejo, a formerly enslaved man known as Negro Primero, "The First Black," a nickname earned by his habit of always being first into the fight. Born into slavery in 1790, Camejo had gained his freedom in 1816 by enlisting in the independence army. At Las Queseras del Medio, he rode alongside Paez and received the Order of the Liberators for his bravery. He would die two years later at the Battle of Carabobo, the decisive engagement that sealed Venezuelan independence. His remains were eventually transferred to the National Pantheon in Caracas in 2015, placed among the founders of the nation he helped free.

After the battle, Bolivar personally awarded Paez and all 153 survivors the Cruz de los Libertadores, the Cross of the Liberators. The engagement at Las Queseras del Medio became one of the defining moments of Venezuelan national identity, proof that discipline, daring, and intimate knowledge of terrain could overcome vastly superior numbers. The battle took place on the open llanos, a landscape so flat that from the air it resembles an ocean of grass bisected by brown rivers. Nothing about this terrain has changed since 1819. The same winds that dried the sweat on Paez's llaneros still sweep across the Apure plains, and the Arauca River still curves through the savannah where 153 horsemen turned a war.