I think it’s time for the 1st armored division to roll across the border...
I would suggest the 1st Cavalry Division. They have 3 armored brigades, 1 artillery brigade, and 1 air cavalry brigade. The air cav can move lots of troops in a hurry. They also have what they call a sustainment brigade (supply). The HQ is at Fort Hood, Texas, so they wouldn’t have to move very far. Full disclosure: I was with the First Cav in VietNam, so I might be a little partial towards them.