New Spain Spain, at 42d north (now the northern boundary of the U.S. states of California, Nevada, and Utah). In the 1821 Declaration of Independence of the Mexican Empire, both Mexico and Central America declared their independence after three centuries of Spanish rule and formed the First Mexican Empire, although Central America quickly rejected the union. After priest Miguel Hidalgo y Costilla's 1810 Grito de Dolores (call for independence), the insurgent army began an eleven-year war. At first, the Criollo class fought against the rebels. But in 1820, a military coup in Spain forced Ferdinand VII to accept the authority of the
Regiment of Artillery of the Nation Regiment of Artillery of the Nation The Regiment of Artillery of the Nation () was an Argentine regiment established in 1812 and disbanded in 1820. It fought in the Argentine War of Independence. During the times of the Viceroyalty of the Río de la Plata, the artillery was managed by the "Royal Body of Artillery". The Primera Junta, the government since the May Revolution, disbanded it and created instead the "Regiment of Flying Artillery" on May 29, 1810, relocating some members of the former one. The "Regiment of Flying Artillery" was disbanded in 1812, and replaced by the "Regiment of