| Description | Event/Country/Person |
| This man is the current NATO Secretary General. | |
| In spring 2011, a civil conflict in this North African country led to a NATO mission to topple its oppressive government. | |
| In 1955, the admission of this country into NATO was seen as the alliance's first major challenge to the Soviet Union. | |
| In 1966, this country left the alliance to pursue an independent defense policy. | |
| This Western European country joined NATO in 1982 after the collapse of its authoritarian government. | |
| In its first, major post-Cold War military action, the alliance enforced a no-fly zone in this country from 1993-1996. | |
| This treaty, signed in 1949 in Washington, D.C., established NATO. | |
| Slobodan Milosevic's military campaign in this region of Yugoslavia prompted NATO intervention in 1999. | |
| These two nations are the most recent additions to NATO, having joined as full members in April 2009. | |
| In 1974, a conflict on the island of Cyprus threatened the NATO alliance after these two countries nearly went to war. | |