That they would take control of the world
Answer:
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 with the ulterior motive to acquire parts of New Mexico for the Texas Republic.
Why, The Wilmot Proviso amendment would have closed California and New
Mexico to slavery in 1846 as a requirement for their annexation,
but Congress did not pass the proviso.
So that everyone in the population have a equal chance in particpating?