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
Portuguese Colonial War had been administered by a provisional government, representatives of the Portuguese government and FRELIMO signed an agreement to grant independence to Mozambique, with the president of FRELIMO to assume the presidency of the newly independent nation. This was followed the next month by the announcement of the independence of Cape Verde, and the establishment of a new nation, the Republic of Cape Verde. In Angola, the Alvor Agreement was signed on January 15, 1975, granting Angola independence from Portugal on 11 November 1975. The Alvor Agreement formally ended the war for independence. The agreement, while signed by the MPLA, the