The relationship between Saudi Arabia and the United States of America was economically strengthened in 1933, when Standard Oil of California was given a concession to explore the Saudi Arabian lands for oil. The subsidiary of this company, regarded as California Arabian Standard Oil Company, later dubbed Saudi Aramco carries out a fruitful exploration in 1938, finding oil for the first time. The relationship between the two nations strengthened throughout the next decade, establishing a full diplomatic relationship through a symbolic acceptance of an American envoy in Saudi Arabia.