According to the “Reconquista” crowd, we absolutely did.
Not what I’m talking about . . . although your point would hold in the 1800s.
Tell the “Reconquista” crowd Gen. Santa Ana and Mexico should not have seized and stolen millions of dollars of American properties, then refused for decades to pay the agreed upon reimbursements for the resulting damages while claiming poverty, and then used its army to invade the United States with the avowed objective of conquering the City of New Orleans and the U.S. Louisiana Territory. In the 19th Century such belligerent acts of conquest could result in the conquest of the aggressor’s territories.