what part,if any,did manifest destiny play in the mexican war?whta other justifications were presented for the formation of war?

Question

the mexican war lasted from 1846 to 1848 following the annexation of texas in 1845

Answer 1

Manifest Destiny particularly served to justify any military action by the U.S. in the name of preventing outside (primarily European) intrusion into the affairs of North and South America, but in this specific case, it was also an excuse that didn't hide the obvious push by Southern states to try and extend slavery to the west coast and try to leverage policy domestically. Also, by this point it was clear that railroads and industrializstion would expand with the frontier, which provided a large incentive for those who hoped to benefit from the war.