The conquest expeditions of Juan del Junco commenced in 1526, when he embarked on a ship leaving Sanlúcar de Barrameda. He served under Sebastian Cabot in the exploration of the Río de la Plata. In 1532 or 1533, taking Hernán Venegas Carrillo with him, Del Junco sailed to Santo Domingo, Hispaniola. From there his plan was to travel to the newly founded city of Cartagena, but went to Santa Marta instead to assist Roberto Infante, then governor of the city, arriving in 1535. Del Junco joined the harsh expedition into the Colombian Andes from Santa Marta as a captain in an expedition led by Gonzalo Jiménez de Quesada, departing on April6, 1536. After almost one year, the heavily reduced regiment reached the Muisca Confederation on the Bogotá savanna. As a captain Del Junco participated in the foundation of Bogotá on August6, 1538 by Gonzalo Jiménez de Quesada; and Tunja on August6, 1539 by Gonzalo Suárez Rendón. Juan del Junco is noted as one of the captains of the newly founded New Kingdom of Granada to hand back the weapons of the earlier dismissed Lázaro Fonte, lover of Zoratama. His companions in this task were Gonzalo Suárez Rendón, Pedro Fernández de Valenzuela and Diego Paredes. Fonte was imprisoned but released when he informed De Quesada of the arrival of two other conquest expeditions on the Altiplano Cundiboyacense, by Nikolaus Federmann from the east and Sebastián de Belalcázarfrom the south. Fonte had used the skin of a deer to write his revelations.
Local government
After the conquest expeditions, captain Del Junco was appointed a regidor of Santa Fe de Bogotá, and received the encomienda of Cucaita, in the province of Tunja. He was the next in line to succeed as governor of the province in the event of the death of Hernán Pérez de Quesada, brother of Gonzalo Jiménez de Quesada. He spent twenty months in the New Kingdom of Granada and extorted 20,000 pesos of gold from the Muisca people. Notable caciques he pillaged gold and emeralds from were the caciques of Quiminza, Cucayta, Boyacá, Sora, Sutamanga and Cuqueitagacha. In a 1560 letter, Juan del Junco wrote to the Spanish Crown "of the 11,000 indians that resided on the banks of the Magdalena River, not even 500 survived".
Personal life
In 1541, Del Junco returned to Santo Domingo, the city he had left six years before. He married Inés de Villalobos, daughter of oidorLucas Vázquez de Ayllón. The couple had children, but their fate is unknown, as is the year of his death.