The Republic of Slovenia joined the North Atlantic Treaty Organisation (NATO) on March 29, 2004, after becoming a full member by depositing its Instrument of Accession in Washington. Slovenia's membership was a strategic goal that the country set for itself after gaining independence in 1991. Slovenia's decision to join NATO was based on its shared values with the alliance, its strategic security interests, and its national interests. Slovenia's citizens also confirmed their commitment to NATO in a consultative referendum