President Obama didn't take unilateral action and certainly didn't declare war.
The U.S. is a signatory of the
U.N. Charter. A unilateral declaration of war is different from a U.N. sanctioned action under its Charter.
See:
United Nations Security Council resolutionThe Libyan action, unlike the U.S. led unilateral invasion of Iraq war, is sanctioned by the U.N.
The UN didn't issue a resolution approving the Iraq war. This is why the RW hates the U.N. They hate international law and order, and only approve of U.S. dominance, including the U.S.'s unilateral right to attack/invade other countries at will.
After securing an AUMF from Congress, Bush still managed to violate it to illegally invade Iraq. The Afghanistan war was basically a declaration of war by Congress, approved by nearly every member of Congress.
United Nations Security Council Resolution 1973 specifically states no ground troops.
Congressional authorization, including funding, would be required for the U.S. to take any direct action beyond the U.N. resolution parameters.
The first Gulf war was launched in August 1990 and the
AUMF approved January 1991.
The Persian Gulf War (August 2, 1990 – February 28, 1991), commonly referred to as simply the Gulf War, was a war waged by a U.N.-authorized coalition force from thirty-four nations led by the United States, against Iraq.
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Within hours of the invasion, Kuwaiti and U.S. delegations requested a meeting of the UN Security Council, which passed Resolution 660, condemning the invasion and demanding a withdrawal of Iraqi troops. On 3 August the Arab League passed its own resolution, which called for a solution to the conflict from within the League, and warned against outside intervention. On 6 August UN Resolution 661 placed economic sanctions on Iraq.
United Nations Security Council Resolution 665 followed soon after, which authorized a naval blockade to enforce the economic sanctions against Iraq. It said the “use of measures commensurate to the specific circumstances as may be necessary ... to halt all inward and outward maritime shipping in order to inspect and verify their cargoes and destinations and to ensure strict implementation of resolution 661.”<28>
linkThe no-fly zones weren't established until
after the war:
The Iraqi no-fly zones were a set of two separate no-fly zones (NFZs), and were proclaimed by the United States, United Kingdom and France after the Gulf War of 1991 to protect humanitarian operations in northern Iraq and Shiite Muslims in the south. Iraqi aircraft were forbidden from flying inside the zones. The policy was enforced by US, UK and French aircraft patrols until France withdrew in 1998. While the enforcing powers had cited United Nations Security Council Resolution 688 as authorizing the operations, the resolution contains no explicit authorization. The Secretary-General of the UN at the time the resolution was passed, Boutros Boutros-Ghali called the no-fly zones "illegal" in a later interview with John Pilger.<1><2>
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The NFZ in the north of Iraq was established shortly after the Gulf War. In August 1992 the NFZ in the south to the 32nd parallel was established,<3> but in 1996 it was expanded to the 33rd parallel.<4> From 1992 to the United States-led coalition invasion of Iraq in 2003, there were two NFZs in Iraq. The northern NFZ extended from the 36th parallel northwards, while the southern extended from the 33rd parallel southwards. The northern NFZ was initially part of Operation Provide Comfort relief operations to a persecuted Kurdish minority in Iraq, and was followed on by Operation Northern Watch. The southern NFZ was maintained by Operation Southern Watch.
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United Nations Security Council Resolution 688