The flag of Mercosur (Mercado Común del Sur) is the banner of the South American customs union founded by the Treaty of Asunción in March 1991. Mercosur is one of the largest trading blocs in the southern hemisphere, accounting for the bulk of South American GDP.
The flag of the Organization of the Petroleum Exporting Countries is the banner of the producer cartel founded in Baghdad in September 1960. OPEC coordinates oil production policy among its member states, which together hold the majority of the world's proven crude reserves.
The flag of the Caribbean Community is the banner of the regional bloc founded by the Treaty of Chaguaramas in 1973. CARICOM coordinates economic, political, and cultural cooperation across the Caribbean, with full membership extending across the English-speaking islands and into the South American mainland (Belize, Guyana, Suriname).
The flag of the Organisation of Islamic Cooperation is the banner of the international body that connects 57 Muslim-majority states. Founded in 1969 in response to the burning of the al-Aqsa Mosque, the OIC is the second-largest international organisation after the United Nations.
The flag of the Eurasian Economic Union is the banner of the customs and economic union founded by treaty in 2014, building on the earlier Customs Union of Belarus, Kazakhstan, and Russia. The EAEU coordinates trade and economic policy across the post-Soviet space.
The flag of the South Asian Association for Regional Cooperation is the banner of the regional intergovernmental organisation founded in Dhaka in December 1985. SAARC links the eight nations of South Asia in a framework for economic and cultural cooperation.
The flag of the Shanghai Cooperation Organisation is the banner of the Eurasian political, economic, and security organisation founded in Shanghai in 2001. The SCO is the largest regional organisation in the world by area and population, covering roughly 60 percent of Eurasia.
The flag of the Gulf Cooperation Council is the banner of the regional intergovernmental union of six Arab Gulf states, founded in Abu Dhabi in May 1981. The GCC coordinates economic, political, and security policy across the Arabian Peninsula.
The flag of the Economic Community of West African States is the banner of the regional bloc founded by the Treaty of Lagos in May 1975. ECOWAS coordinates trade, economic, and security policy across West Africa, and operates a peacekeeping force (ECOMOG) that has intervened in regional conflicts since the early 1990s.