New Mexico Territorial Laws and Treaties NM TREATIES GADSDEN TREATY, Art. 7

Should there at any future period (which God forbid) occur any disagreement between the two nations which might lead to a rupture of their relations and reciprocal peace, they bind themselves in like manner to procure by every possible method the adjustment of every difference; and should they still in this manner not succeed, never will they proceed to a declaration of war, without having previously paid attention to what has been set forth in Article Twenty-One of the treaty of Guadalupe for similar cases; which article, as well as the Twenty-Second, is here reaffirmed.