In 1936, the Texas Corporation purchased the Barco oil concession in Colombia, and formed a joint venture with Socony-Vacuum, now Mobil, to develop it. Over the next three years the company engaged in a highly challenging project to drill wells and build a pipeline to the coast across mountains and then through uncharted swamps and jungles. During this time, Texaco also illegally supplied the fascist Gen. Franco faction in Spanish Civil War, despite a federal fine, with a total of oil.