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
Angolan War of Independence the MPLA after Neto reasserted his leadership. The combined forces of the MPLA, the UNITA, and the FNLA succeeded in their rebellion not because of their success in battle, but because of the Movimento das Forças Armadas' coup in Portugal. The MFA was an organisation of lower-ranked officers in the Portuguese Armed Forces which was responsible for the Carnation Revolution of 25 April 1974, which ended the Portuguese Colonial War and led to the independence of the Portuguese overseas territories. The MFA overthrew the Lisbon government in protest against the authoritarian political regime and the ongoing African colonial wars, specially