I'm no historian, but I don't think the Mier Expedition had anything to do with New Mexico.
http://www.tshaonline.org/handbook/onli ... /qym2.html. During the existence of the Republic of Texas, the Texians' hands were plenty full with matters much further east (Comanches, Mexicans, general lack of infrastructure or civilization), so no, they never really controlled what is now New Mexico. Never really tried, for that matter. Maybe you are referring to the Santa Fe Expedition. Rather than being an effort to displace New Mexicans, that was actually an attempt to sway Santa Fe merchants and thereby reap the benefits of commerce between St. Louis and Santa Fe on the Santa Fe Trail. It failed: the New Mexican governor, loyal to Mexico, sent armed troops to meet the Texians.
There were some failed Confederate attacks launched from Texas on Union forces in New Mexico (Glorietta Pass, Valverde), but that was an entirely different matter--and they occurred in 1862.
God and Texas.
Doc Hudson wrote:Pete, i know that map represents territory claimed by the Republic of Texas, and traditionally included in the old Mexican State of Tejas y Coahuila, but were the Texians ever able to take actual control of what is noe New Mexico?
I seem to remember several Texian Expeditions, including the Meier Expedition, that came to grief trying to oust the Mexicans from New Mexico.