The Mexican Frontier, 1821–1846 published by other historians. This work was supplemented by additional primary materials which he discovered in the archives that allowed him to delve further into certain areas. "The Mexican Frontier" examines the southwestern United States, specifically the areas now known as Arizona, California, New Mexico, and Texas, in the twenty-five years between Mexico's independence from Spain and the beginning of the Mexican–American War. This resulted in the transfer of control of the border areas to the United States. In the early days of the Republic of Mexico, these areas comprised its northern border, including the territories of Alta California and
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