Why did Mirabeau Lamar lead the Santa Fe expedition?

Mirabeau Lamar led the Santa Fe Expedition in 1841 primarily to assert Texas's claim over the Santa Fe region, which was believed to be rich in resources and strategically important. He aimed to expand Texas's territory and promote economic growth. Additionally, the expedition was intended to establish stronger political and commercial ties with New Mexico, further solidifying Texas's independence from Mexico. However, the expedition ultimately ended in failure, leading to significant casualties and diplomatic tensions.