Mexican Army General who built a successful political and military coalition that was able to march into Mexico City on 27 September 1821; decisively ending the Mexican War of Independence. After the liberation of Mexico was secured, he was proclaimed Constitutional Emperor of the new nation. DS, in Spanish, one page, 6 x 8.25, April 13, 1815. Neat and boldly penned military document, signed at the conclusion “Augustin de Iturbide.” In fine condition, with bisecting folds, a few creases, and a small chip to bottom edge. RRAuction COA.