Why did President Lamar order the Santa Fe Expedition to annex Santa Fe?

President Mirabeau B. Lamar ordered the Santa Fe Expedition in 1841 to assert Texas's claim over the Santa Fe region and to promote economic expansion by establishing trade routes. He aimed to strengthen Texas's position against Mexico and enhance its viability as an independent republic. The expedition was also motivated by a desire to gain more territory and resources for the young nation. However, the mission ultimately faced logistical challenges and hostile reception, leading to its failure.