Related Clues:

• Growing alliance
• U.S. force in Europe
• Western defense org.
• Defense grp.
• Treaty grp.
• The U.S. is in it
• Defense grp. since 1949
• Alliance acronym
• Group with hdqrs. in Belgium
• 1949 defense org.
• Cold war winner
• Gp. headquartered in Brussels
• Post-WWII alliance
• Brussels-based grp.
• International alliance