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.
Royal Danish Navy The Royal Danish Navy (Danish: "Søværnet" ) is the sea-based branch of the Danish Defence force. The RDN is mainly responsible for maritime defence and maintaining the sovereignty of Danish, Greenlandic and Faroese territorial waters. Other tasks include surveillance, search and rescue, icebreaking, oil spill recovery and prevention as well as contributions to international tasks and forces.