Slovenia differs in several respects from all other countries which have joined the Alliance since the end of the “Cold War”. From 1992 onwards, all Slovenian governments have strongly advocated NATO membership, primarily on long-term security grounds. The issue, however, cut across the Slovenian polity, initially with considerable opposition on both sides of the spectrum. Slovenia was the second candidate country to submit the issue to a referendum prior to the admission. The vote showed a two-third support for NATO membership. Since then it has become widely accepted by the public. Slovenia's participation in the functioning of the Alliance has become regularized both in the civilian political and the military spheres. Slovenian experience since the admission has brought the country the most important lessons in realistic defence planning, solidarity among members and assistance to aspirants.