Map of hampshire for Foreign competition from the United States and VENEZUELA also harmed Mexico’s position as a leading producer. Eventually, the Mexican oil industry also became a battleground for the major oil companies and the country’s government. The Mexican Revolution, which began in 1910, sought national ownership of mineral resources such as oil. The 1917 constitution established government ownership of the subsoil. Along with many new regulations and taxes, the stipulations of the new constitution led foreign companies to begin to withdraw investment from Mexico and the country began to decline as a major producer. In 1937, there was a dispute between U.S. Map of hampshire 2016.