What colony was vasco nunez de balboa supreme commander of?

Vasco Núñez de Balboa was the supreme commander of the colony of Darien, which was established on the Isthmus of Panama in 1510. This settlement was one of the first permanent European colonies on the mainland of the Americas. Balboa is best known for his exploration of the Pacific Ocean, which he reached in 1513 after crossing the isthmus.