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
Dominican War of Independence Dominican War of Independence The Dominican Independence War gave the Dominican Republic autonomy from Haiti on February 27, 1844. Before the war, the island of Hispaniola had been united under the Haitian government for a period of 22 years when the newly independent nation, previously known as the Captaincy General of Santo Domingo, was unified with Haiti in 1822. The criollo class within the country overthrew the Spanish crown in 1821 before unifying with Haiti a year later. In 1844, the members of La Trinitaria chose El Conde, the prominent “Gate of the Count” in the old city walls, as