Over the history of the USA and for that fact almost all countries have done it i.e. signed treaties, alliances, agreements, etc. NATO for one it means any member (like the USA) can ask for military assistance if under threat from another country and NATO members will come to the threatened country. SEATO Southeast Asia Treaty Organization was same alliance (USA belonged) that gave us Vietnam.. RESOLUTION 687 (1991) Adopted by the Security Council at its 2981st meeting, Reaffirming the need to be assured of Iraq's peaceful intentions in the light of its unlawful invasion and occupation of Kuwait, Taking note of the letter sent by the Minister for Foreign Affairs of Iraq on 27 February 1991 and those sent pursuant to resolution 686 (1991), RESOLUTION 687 (1991) Adopted by the Security Council at its 2981st meeting, on 3 April 1991 Iraqi Challenges and U.S. Responses: March 1991 through October 2002 November 20, 2002 Page 2... Increasing Iraqi obstruction of U.N. weapons inspections, despite several pledges by Iraqi officials to cooperate, led to the withdrawal of U.N. inspectors in December 1998. There followed four days of air and missile strikes against Iraq by U.S. and British air force and naval units. A series of follow-on military clashes haveoccurred since 1998, as Iraqi air defense units have tried to target allied aircraft enforcing the no-fly zones over northern and southern Iraq. After a brief lull following the September 11, 2001 terrorist attacks, military clashes between allied and Iraqi units intensified in 2002, amid widespread discussion that the United States might undertake a major military campaign to unseat Iraqi President Saddam Hussein and eliminate Iraqs weapons of mass destruction or programs to develop them. On October 11, 2002, President Bush signed H.J.Res. 114 (P.L. 107-243), which authorizes the President to use the U.S. armed forces to defend the national security of the United States against the continuing threat posed by Iraq, and enforce all relevant U.N. Security Council resolutions regarding Iraq. www.au.af.mil/au/awc/awcgate/crs/rl31641.pdf So NATO got us Korea... SEATO Vietnam 1991 Cease Fire violation "Liberation of Iraq"