Explain the border dispute between mexico, the us, and texas

Conflict with Mexico began when the United States annexed Texas as a state in 1845. Mexico claimed that the new border between Texas and Mexico was the Nueces River, while the United States contested the border was the Rio Grande. Fighting began when a detachment of U.S. cavalry was attacked near the Rio Grande.

i belive the continental association was created to boycott all contact with british goods.

i also belive it was in december 1, 1774