This movie is a dramatizaion of what happened during the tragic Texan Santa Fé Expedition 0f 1841. The name of this film is Dead Man's Walk.
The 'Texan Santa Fe Expedition was a commercial and military expedition to secure the Republic of Texas's claims to parts of Northern New Mexico for Texas in 1841. The expedition was unofficially initiated by the then President of Texas, Mirabeau B. Lamar, in an attempt to gain control over the lucrative Santa Fe Trail and further develop the trade links between Texas and New Mexico. The initiative was a major component of Lamar's ambitious plan to turn the fledgling republic into a continental power, which the President believed had to be achieved as quickly as possible to stave off the growing movement demanding the annexation of Texas to the United States. Lamar's administration had already started courting the New Mexicans, sending out a commissioner in 1840, and many Texans thought that they might be favorable to the idea of joining the Republic of Texas.
The expedition set out from Kenney's Fort near Austin on June 19, 1841. The expedition included 21 ox-drawn wagons carrying merchandise estimated to be worth about $200,000. Among the men were merchants that were promised transportation and protection of their goods during the expedition, as well as commissioners William G. Cooke, Richard F. Brenham, José Antonio Navarro, and George Van Ness. Although officially a trading expedition, the Texas merchants and businessmen were accompanied by a military escort of some 320 men. The military escort was led by Hugh McCleod and included a company of artillery.