Fifth Republic Movement
Venezuela historiography recognizes four "republics," or major regime changes since the country was founded in 1811. The First Republic, known as the "Venezuelan Confederation" lasted until 1812. The Second Republic is the restored republican regime that was instituted by Simón Bolívar after his Admirable Campaign in 1813, and which lasted until 1814. The Third Republic refers to the period after 1816 in which various patriot guerrilla bands joined under Bolívar's leadership in the Llanos of Venezuela and set up an independent government. This process culminated in the Congress of Angostura, but shortly thereafter the Congress declared Venezuela to be part of a larger Gran Colombia. Gran Colombia lasted only a decade and at its dissolution Venezuela became once again the "Republic of Venezuela," which is considered the start of the Fourth Republic. In 1864 the country was then restructured into the "United States of Venezuela", before reverting once again to the name, "Republic of Venezuela" in 1953. Although both periods began with the implementation of new constitutions (the fourth and twenty-fourth constitutions, respectively), both have been deemed by Venezuelan historiography as a continuation of the Fourth Republic.
Guyana–Venezuela relations
Venezuela claimed more than half of the territory of the British colony of Guyana at the time of the Latin American wars of independence, a dispute that was settled by arbitration in 1899 after the Venezuela Crisis of 1895. In 1962 Venezuela declared that it would no longer abide by the arbitration decision, which ceded mineral-rich territory in the Orinoco basin to Guyana. The disputed area is called Guayana Esequiba by Venezuela. A border commission was set up in 1966 with representatives from Guyana, Venezuela and Great Britain, but failed to reach agreement. Venezuela vetoed Guyana's bid to become a member of the Organization of American States (OAS) in 1967. In 1969 Venezuela backed an abortive uprising in the disputed area.