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 under Portuguese rule became a major goal for the governments of the independent territory. The sharp recession and the chaos in many areas of Angolan life eroded the initial impetus of nationalistic fervor. There were also eruptions of black racism in the former overseas province against white and mulatto Angolans. Angolan War of Independence The Angolan War of Independence (1961–1974) began as an uprising against forced cotton cultivation, and it became a multi-faction struggle for the control of Portugal's overseas province of Angola among three nationalist movements and a separatist movement. The war ended when a leftist military coup in