Which intergovernmental military alliance signed in 1949 are Denmark and the Netherlands both members of?
NATO The North Atlantic Treaty Organization (NATO ; French: "Organisation du Traité de l'Atlantique Nord" ; "OTAN "), also called the North Atlantic Alliance, is an intergovernmental military alliance between several North American and European states based on the North Atlantic Treaty that was signed on 4 April 1949.
Visegrád Group The Visegrad Group, also called the Visegrad Four, or V4 is a cultural and political alliance of four Central European statesthe Czech Republic, Hungary, Poland and Slovakiafor the purposes of furthering their European integration, as well as for advancing military, economic and energy cooperation with one another. The group used to be occasionally referred to as the Visegrád Triangle, due to the fact that it was originally an alliance of three states – the term has not been valid since 1993, but does continue to appear sometimes.