Mexican Cession Mexican Cession, with considerable local autonomy punctuated by several revolts and few troops sent from central Mexico, in the period from 1821–22 after independence from Spain up through 1846 when U.S. military forces seized control of California and New Mexico on the outbreak of the Mexican–American War. The northern boundary of the 42nd parallel north was set by the Adams–Onís Treaty signed by the United States and Spain in 1821 and ratified by Mexico in 1831. The eastern boundary of the Mexican Cession was the Texas claim at the Rio Grande and extending north from the headwaters of the Jojo
Ecuadorian War of Independence Guaranda on September 2, 1821. Aymerich moved to block any further progress, and in the Second Battle of Huachi, which took place on September 12, 1821, annihilated Sucre's infantry. The patriot forces lost 800 men, mostly killed, plus 50 prisoners, among them General Mires. As Second Huachi had also taken a heavy toll on the Royalists, Aymerich decided against exploiting his victory with an advance on the coastal plains. On November 19, 1821, a 90-day armistice was signed at Babahoyo, putting an end to Sucre's ill-fated first attempt to liberate Quito. Ecuadorian War of Independence The Ecuadorian War of Independence