The term federalist describes several political beliefs around the world. It may also refer to the concept of parties, whose members or supporters called themselves Federalists. History Europe federation In Europe, proponents of deeper European integration are sometimes called Federalists. A major European NGO and advocacy group campaigning for such a political union is the Union of European Federalists. Movements towards a peacefully unified European state have existed since the 1920s, notably the Paneuropean Union. A pan-European party with representation in the European Parliament fighting for the same cause is Volt Europa. In the European Parliament the Spinelli Group brings together MEPs from different political groups to work together of ideas and projects of European federalism; taking their name from Italian politician and MEP Altiero Spinelli, who himself was a major proponent of European federalism, also meeting with fellow deputies in the Crocodile Club. Notable European Federalists are former European Commission president Jean-Claude Juncker, current EC president Ursula von der Leyen, leader of ALDE group Guy Verhofstadt, German Federal Minister for Economic Affairs and Energy of Germany Peter Altmaier, German MEP Elmar Brok and the former leader of the SPD Martin Schulz. Latin America In the Spanish-speaking parts of Latin America the term "federalist" is used in reference to the politics of 19th-century Argentina and Colombia. The Federalists opposed the Unitarians in Argentina and the Centralists in Colombia through the 19th century. Federalists fought for complete self-government and full provincial autonomy, as opposed to the centralized government that the Unitarians and Centralists favored. Furthermore, Federalists demanded tariff protection for their industries and, in Argentina, called for the end of the Buenos Aires customs as the only intermediary for foreign trade. During the Federal War (1859-1863) in Venezuela, liberal caudillos confronted conservatives, leading to the establishment of the modern federal States of Venezuela. Argentina The one Federalist leader in the Platine Region was José Gervasio Artigas, who opposed the centralist governments in Buenos Aires that followed the May Revolution, and created instead the Federal League in 1814 among several Argentine Provinces and the Banda Oriental (modern-day Uruguay). In 1819, the Federal armies rejected the centralist Constitution of the United Provinces of South America and defeated the forces of Supreme Director José Rondeau at the 1820 Battle of Cepeda, effectively ending the central government and securing Provinces' sovereignty through a series of inter-Provincial pacts (v.g. Treaty of Pilar, Treaty of Benegas, Quadrilateral