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
Battle of Galveston to destroy the grounded "Westfield" with explosives rather than let it fall into enemy hands. Renshaw and several Union troops were subsequently killed when the explosives were set off too early. Union troops on shore were convinced that their own ships were surrendering and, therefore, laid down their arms. The remaining U.S. ships did not surrender and succeeded in retreating to Union-controlled New Orleans. The Union blockade around the city of Galveston was lifted temporarily for four days, and Galveston remained the only major port that remained in Confederate hands at the end of the war. The Confederate Congress stated