<Table> <Tr> <Th> Date </Th> <Th> Country </Th> <Th> Enlargement </Th> <Th> Notes </Th> </Tr> <Tr> <Td> 24 August 1949 </Td> <Td> Belgium </Td> <Td> Founders </Td> <Td> </Td> </Tr> <Tr> <Td> Canada </Td> <Td> </Td> </Tr> <Tr> <Td> Denmark </Td> <Td> Denmark's NATO membership includes the Faroe Islands and Greenland . </Td> </Tr> <Tr> <Td> France </Td> <Td> France withdrew from the integrated military command in 1966 to pursue an independent defense system but returned to full participation on 3 April 2009 . </Td> </Tr> <Tr> <Td> Iceland </Td> <Td> Iceland, the sole member that does not have its own standing army, joined on the condition that it would not be expected to establish one . However, its strategic geographic position in the Atlantic made it an invaluable member . It has a Coast Guard and has recently contributed a voluntary peacekeeping force, trained in Norway for NATO . </Td> </Tr> <Tr> <Td> Italy </Td> <Td> </Td> </Tr> <Tr> <Td> Luxembourg </Td> <Td> </Td> </Tr> <Tr> <Td> Netherlands </Td> <Td> </Td> </Tr> <Tr> <Td> Norway </Td> <Td> </Td> </Tr> <Tr> <Td> Portugal </Td> <Td> </Td> </Tr> <Tr> <Td> United Kingdom </Td> <Td> </Td> </Tr> <Tr> <Td> United States </Td> <Td> </Td> </Tr> <Tr> <Td> 18 February 1952 </Td> <Td> Greece </Td> <Td> First </Td> <Td> Greece withdrew its forces from NATO's military command structure from 1974 to 1980 as a result of Greco - Turkish tensions following the 1974 Turkish invasion of Cyprus . </Td> </Tr> <Tr> <Td> Turkey </Td> <Td> </Td> </Tr> <Tr> <Td> 6 May 1955 </Td> <Td> Germany </Td> <Td> Second </Td> <Td> Commonly known as West Germany when it joined; it later reunited with Saarland in 1957 and with the Berlin territories and East Germany on 3 October 1990 . East Germany was a member of the rival Warsaw Pact 1956--1990 . </Td> </Tr> <Tr> <Td> 30 May 1982 </Td> <Td> Spain </Td> <Td> Third </Td> <Td> </Td> </Tr> <Tr> <Td> 12 March 1999 </Td> <Td> Czech Republic </Td> <Td> Fourth </Td> <Td> Member of the rival Warsaw Pact 1955--1991 as part of Czechoslovakia . </Td> </Tr> <Tr> <Td> Hungary </Td> <Td> Member of the rival Warsaw Pact 1955--1991 . </Td> </Tr> <Tr> <Td> Poland </Td> <Td> Member of the rival Warsaw Pact 1955--1990 . </Td> </Tr> <Tr> <Td> 29 March 2004 </Td> <Td> Bulgaria </Td> <Td> Fifth </Td> <Td> Member of the rival Warsaw Pact 1955--1991 . </Td> </Tr> <Tr> <Td> Estonia </Td> <Td> Member of the rival Warsaw Pact 1955--1991 as part of the Soviet Union . </Td> </Tr> <Tr> <Td> Latvia </Td> <Td> Member of the rival Warsaw Pact 1955--1991 as part of the Soviet Union . </Td> </Tr> <Tr> <Td> Lithuania </Td> <Td> Member of the rival Warsaw Pact 1955--1990 as part of the Soviet Union . </Td> </Tr> <Tr> <Td> Romania </Td> <Td> Member of the rival Warsaw Pact 1955--1991 . </Td> </Tr> <Tr> <Td> Slovakia </Td> <Td> Member of the rival Warsaw Pact 1955--1991 as part of Czechoslovakia . </Td> </Tr> <Tr> <Td> Slovenia </Td> <Td> Previously part of Yugoslavia 1945--1991 (Non-aligned) </Td> </Tr> <Tr> <Td> 1 April 2009 </Td> <Td> Albania </Td> <Td> Sixth </Td> <Td> Member of the rival Warsaw Pact 1955--1968 . </Td> </Tr> <Tr> <Td> Croatia </Td> <Td> Previously part of Yugoslavia 1945--1991 (Non-aligned) </Td> </Tr> <Tr> <Td> 5 June 2017 </Td> <Td> Montenegro </Td> <Td> Seventh </Td> <Td> Previously part of Yugoslavia 1945--2006 (Non-aligned) </Td> </Tr> </Table> <Tr> <Th> Date </Th> <Th> Country </Th> <Th> Enlargement </Th> <Th> Notes </Th> </Tr> <Tr> <Td> 24 August 1949 </Td> <Td> Belgium </Td> <Td> Founders </Td> <Td> </Td> </Tr> <Tr> <Td> Canada </Td> <Td> </Td> </Tr>

Which country is set to become the new member of the north atlantic treaty organisation