The U.S. did support Mexico's War for independence. However, I was...

The U.S. did support Mexico's War for independence. However, I was referring to the Texas Revolution, the one in which Americans who had immigrated to Mexico rebelled and won their independence in the 1830s. Texas became its own country as a result, which lasted about a decade. The U.S. refused to intervene in the war. What did the course materials explain was the reasoning behind this?