They marched all the way to Mexico City but only annexed the likes of New Mexico, California, Arizona etc. the reason they didnât want to take any more was that they would then have to include the additional territories as part of the USA and donât want to be stuck with the Mexican population and have to provide for them or give them a say in matters of the States, let alone a right to vote to guys with darker skin than them.
The below is a fascinating and very accessible read on US colonialism - Iâd highly recommend it. Covers the above in decent detail
Robert E Lee was long dead by the time of the Mexican Revolution.
He made his name in the aforementioned Mexican-American war.
Not too many Paddies died or fought with Pancho Villa in the revolution. A fair clatter did however fight in the Mexican American war, as it coincided with Irish immigration due to the famine.
The two wars you are conflating took part 65-75 years apart