Complex sentence: Diego de Alvitez traveled the trail, verifying its superiority to Balboa's route and, in 1516, the viceroy Pedrarias ordered Gaspar de Espinosa to construct the Camino Real--the Royal Road--along the route of the old Panamanian trail.
Split into simpler sentences: Diego de Alvitez traveled the trail, verifying its superiority to Balboa's route. In 1516, the viceroy Pedrarias ordered Gaspar de Espinosa to construct the Camino Real--the Royal Road--along the route of the old Panamanian trail.