| Treaty gp. | 10 |
| Treaty acronym | 14 |
| Spain joined it in 1982 | 23 |
| Peacekeeping alliance | 21 |
| Partnership for Peace org. | 26 |
| Org. founded in 1949 | 20 |
| Military alliance gp. | 21 |
| Former Haig command | 19 |
| European defense grp. | 21 |
| Defense pact | 12 |
| Defense org. since '49 | 26 |
| Defense alliance | 16 |
| Cold war defense grp. | 21 |
| Cold War defense gp. | 20 |
| Brussels-based alliance | 23 |
| Alliance based in Brussels | 26 |
| Western alliance since 1949 | 27 |
| Warsaw Pact's Cold War opponent | 35 |
| Postwar pact | 12 |
| Peacekeeping grp. since 1949 | 28 |
| Peacekeeping force | 18 |
| Peace-keeping grp. | 18 |
| Org. with a secretary general | 29 |
| Org. formed on April 4, 1949 | 28 |
| Org. expanding into Eastern Europe | 34 |
| Org. established in 1949 | 24 |
| Military alliance gp. since 1949 | 32 |
| Military alliance | 17 |
| Kosovo peacekeeping group | 25 |
| Kosovo peacekeeping gp. | 23 |
| Its members include Canada and Luxembourg | 41 |
| It's HQ'd in Brussels | 29 |
| It now includes Lat. and Lith. | 30 |
| Intl. pact | 10 |
| Intl. group | 11 |
| Intl. defense alliance | 22 |
| Intl. alliance | 14 |
| International org. | 18 |
| International defense org. | 26 |
| Int'l org. formed in 1949 | 29 |
| HST's pact | 14 |
| Grp. with forces | 16 |
| Grp. involved with Kosovo | 25 |
| Grp. including Luxembourg, Turkey and Italy | 43 |
| Grp. headquartered in Brussels | 30 |
| Gp. with forces | 15 |
| Expanding grp. | 14 |
| European defense org. | 21 |
| Defense org. established in 1949 | 32 |
| Def. alliance | 13 |
| Croatia joined it in '09 | 28 |
| Collective defense group | 24 |
| Brussels-based gp. | 18 |
| Belg.-based peacekeeping gp. | 28 |
| Belg.-based alliance | 20 |
| Atlantic defence org. | 21 |
| Alliance since 1949 (abbr.) | 27 |
| Alliance letters | 16 |
| Alliance headquartered in Brussels | 34 |
| Alliance founded in 1949 | 24 |
| Alliance est. 1949 | 18 |
| Alliance born in the Cold War era | 33 |
| Acronym in the news | 19 |
| 1949 alliance | 13 |
| World org. | 10 |
| Western-alliance letters | 24 |
| Western defense assn. | 21 |
| Western alliance acronym | 24 |
| Western alliance (4) | 20 |
| Western acronym | 15 |
| Warsaw Pact counterpart, once | 29 |
| W.W. II offshoot | 16 |
| W.W. II byproduct | 17 |
| USA alliance | 12 |
| U.S./European force | 19 |
| U.S. force in Europe | 20 |
| Turkey is a part of it | 22 |
| Treaty of 1949 | 14 |
| Treaty alliance | 15 |
| The U.S. is in it | 17 |
| The U.K. is in it, but Ire. is not | 34 |
| The U.K. is a member of it | 26 |
| Taliban-fighting force (abbr.) | 30 |
| Strike authorizer | 17 |
| SHAPE is part of it | 19 |
| Security grp. | 13 |
| Security agcy. since 1949 | 25 |
| SEATO cousin | 12 |
| Science for Peace and Security gp. | 34 |
| Postwar alliance | 16 |
| Post-WWII grp. | 14 |
| Post-WW2 alliance | 17 |
| Post-W.W. II assn. | 18 |
| Post WWII alliance | 18 |
| Peacekeeping gp. since 1949 | 27 |
| Peacekeeping force source | 25 |
| Peacekeeping force in Bosnia | 28 |
| Peacekeeping alliance: Abbr. | 28 |
| Peacekeeping acronym | 20 |
| Peace-keeping gp. | 17 |