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
Visions of Jesus and Mary had gathered roses. Over the years, Our Lady of Guadalupe became a symbol of the Catholic faith in Mexico. By 1820 when the Mexican War of Independence from Spanish colonial rule ended Our Lady of Guadalupe had come to symbolize the Mexican nation. Today it remains a strong national and religious symbol in Mexico. On St. Peter's Day in 1559, Saint Teresa of Avila (Teresa de Jesús) reported a vision of Jesus present to her in bodily form. For almost two years thereafter she reported similar visions. Saint Teresa’s visions transformed her life and she became a key figure in