Visegrád GroupThe Visegrád Group (also known as the Visegrád Four, the V4, or the European Quartet) is a cultural and political alliance of four Central European countries: the Czech Republic, Hungary, Poland, and Slovakia. The alliance aims to advance co-operation in military, economic, cultural and energy affairs, and to further their integration with the EU. All four states are also members of the European Union (EU), the North Atlantic Treaty Organization (NATO), and the Bucharest Nine (B9).
Open borderAn open border is a border that enables free movement of people (and often of goods) between jurisdictions with no restrictions on movement and is lacking substantive border control. A border may be an open border due to intentional legislation allowing free movement of people across the border (de jure), or a border may be an open border due to a lack of legal controls, a lack of adequate enforcement or adequate supervision of the border (de facto).
Overseas departments and regions of FranceThe overseas departments and regions of France (départements et régions d'outre-mer, depaʁtəmɑ̃ e ʁeʒjɔ̃ d‿utʁəmɛʁ; DROM) are departments of the Republic of France which are outside the continental Europe situated portion of France, known as "metropolitan France". The distant parts have exactly the same status as mainland France's regions and departments. The French Constitution provides that, in general, French laws and regulations (France's civil code, penal code, administrative law, social laws, tax laws, etc.
