Benelux is a politico-economic union comprising three neighboring countries: Belgium, the Netherlands, and Luxembourg. Established to promote economic cooperation and integration among its member states, Benelux served as a precursor to larger European integration efforts, such as the European Coal and Steel Community (ECSC) and the European Atomic Energy Community (Euratom). This collaboration helped to pave the way for a more united Europe in the post-World War II era.