In 1821, El Salvador and the other Central American provinces declared their independence from Spain. When these provinces were joined with Mexico in early 1822, El Salvador resisted, insisting on autonomy for the Central American countries. In 1823, the United Provinces of Central America was formed of the five Central American states under Gen. Manuel Jose Arce. When this federation was dissolved in 1838, El Salvador became an independent republic. El Salvador's early history as an independent state--as with others in Central America--was marked by frequent revolutions; not until the period 1900-30 was relative stability achieved. Following a deterioration in the country's democratic institutions in the 1970s a period of civil war followed from 1980-1992. More than 75,000 people are estimated to have died in the conflict. In January 1992, after prolonged negotiations, the opposing sides signed peace accords which ended the war, brought the military under civilian control, and allowed the former guerillas to form a legitimate political party and participate in elections.