A line of seven army posts was established in 1848–49 after the Mexican War to protect the settlers of Texas along the western American Frontier and included Fort Worth, Fort Graham, Fort Gates, Fort Croghan, Fort Martin Scott, Fort Lincoln, and Fort Duncan. Originally, 10 forts had been proposed by Major General William Jenkins Worth (1794–1849), who commanded the Department of Texas in 1849. In January 1849, Worth proposed a line of 10 forts to mark the western Texas frontier from Eagle Pass to the confluence of the West Fork and Clear Fork of the Trinity River. One month later, Worth died from cholera in South Texas.