Free State of Galveston as well as the nearby city of Brazoria. The opening of the Houston Ship Channel in 1915 further challenged the port city. Houston and Texas City, as well as other ports, rapidly overtook Galveston as leading ports and commercial centers; by 1930 map makers were showing Houston as the major city on the Texas coast, instead of Galveston. Cotton shipping, which Galveston had thoroughly dominated on a worldwide level, began migrating to other ports in Texas and on the West Coast. As Galveston's traditional economy declined, Texas' oil boom began in 1901, with oil wells and refineries constructed throughout the
Port of Galveston island's grade. As a result, the port was now considered a deep-water port and was able to handle larger ships. By the time World War I began, Galveston "was the leading cotton port in the world, the third largest exporter of wheat, and an important sugar import center." The port also became a major immigration center, with almost 50,000 people entering the country between 1906 and 1914. In March 1920 local longshoreman called for a strike, seeking a wage increase and recognition of their union, the International Longshoreman's Association. Some of the port traffic was diverted to the Port of