If Texas truly made up its mind to leave the union, Washington DC wouldnt do more than issue a bunch of stern letters.>>> agreed and i would stand up as the pennsylvania committee of correspondence and assist in taking up arms to assist the texas delegation in it cessation.
Thank you, but I highly doubt that secession of any state would result in violence in this era.
An exception would be a scenario in which the residents of a state bear more allegiance to another country, than they do to the U.S. This could actually happen in California, if the foreign born Hispanics there achieve numerical dominance, then decide to become a state of Mexico. Under those circumstances I can see possible military action on the federal government's part.