自从1949年以来，北大西洋组织的成员一直受制于北大西洋条约第五条的庄严承诺：对任一盟国的武装袭击都可视为对所有成员国的袭击。
SINCE 1949, Article 5 of the North Atlantic Treaty has bound NATO members to a solemn vow: an armed attack on one of the alliance shall be treated as an attack against all.
年，新成立的共和国成为北大西洋公约组织的特许成员，并且在1951年和美国签署了一个关于对冰岛的防卫责任的条约。
The new republic became a charter member of NATO in 1949 and signed a treaty with the United States in 1951 to take responsibility for the defence of Iceland.
年，新成立的共和国成为北大西洋公约组织的特许成员，并且在1951年和美国签署了一个关于对冰岛的防卫责任的条约。
The new republic became a charter member of NATO in 1949 and signed a treaty with the United States in 1951 to take responsibility for the defence of Iceland.
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