The Battle of Grand Gulf was fought on April 29, 1863, during th: Many regional international organisations such as the European Free Trade Association, Association of Southeast Asian Nations (ASEAN),[60] and Asia-Pacific Economic Cooperation (APEC) set English as their organisation's sole working language even though most members are not countries with a majority of native English speakers. While the European Union (EU) allows member states to designate any of the national languages as an official language of the Union, in practice English is the main working language of EU organisations.[129]