This 1853 deal that brought the U.S. chunks of New Mexico & Arizona is known in Mexico as the sale of La Mesilla
... Rio Grande, otherwise called the 
Rio Bravo del Norte, or opposite the ... where it strikes the southern boundary of 
New Mexico, thence west- ward ..... also brought in a resolution asking 
information as to whether ...... that La Mesilla belonged to the United States; but to 
a nation.