In the face of the UN Security Council deadlocked on Syria, the United States and its allies may seek to legitimize any other means they launched a retaliatory strike against the Syrian government last week alleged gas attacks on civilians.
Syria since 2011, 15 national parliaments has been split. President Bashar al-Assad's allies, Russia and China have vetoed three resolutions condemning Assad and his government appealed against punitive measures.
But the United States has been involved in the conflict without Security Council backing before, most notably in the 1999 war in Kosovo, it may do so again.
Without a clear UN mandate by the United States, Britain, France and others may be angered Russia by any strikes, which might be expected to condemn illegal.
U.S. Foreign Relations Committee Chairman Richard Haass, think tanks, rejected the idea - suggested that Russia - the West's attack on Syria would require the approval of the United Nations.
"UN Security Council is not the only or unique custodian of what is legal, what is legal, and, as many have pointed out, when the bypass in Kosovo," he told reporters in a conference call.
"Said the only UN Security Council can make a legitimate thing, it seems to me, can not be supported because it would allow in this case, countries such as Russia and the wider international law in international relations position of arbiter, "Haas said.
Haas said that the legality of the strike Syria, may come from individual countries to support retaliation against Assad, to justify the use of weapons of mass destruction will not be tolerated. "Coalition of the willing."
This alliance may include official from the Arab countries and the backing of NATO or other institutions, he said.
U.S. and European officials cited the NATO bombing campaign designed to pressure Yugoslav President Slobodan Milosevic to withdraw from Kosovo and the militia. In this case, the United States to bypass the Security Council, in order to avoid the Russian veto, and get support, rather than NATO.
The Arab League has officially agreed to take military action against Syria, because it is with Libya in 2011, said Richard McGowan, at New York University's foreign policy experts. But it may not be easy to reach a consensus, the Arab League and NATO.
McGowan said: "Some members of the two groups have such doubts, diplomacy might be a bit messy,."
U.S. President Barack Obama has been trying to distinguish himself from his predecessor George · W · Bush himself as more and more foreign policy of multilateralism. No doubt he will like some kind of international legitimacy, if the United States attacked Syria.
But tough tone on Syria advice, by Secretary of State John Kerry and strongly suggesting that the U.S. Navy is entering location may mean Obama will continue to work with no matter what Assad's forces attacked.
White House spokesman Jay Carney on Monday about whether Obama will seek to deflect from the United Nations or the U.S. Congress authorized a military strike against Syria, said the president's reaction to the United States to make any decision problem.
Carney has repeatedly said the Syrian government has carried out "in clear violation of international norms" alleged use of chemical weapons against civilians. Russia and Assad accused the rebels attacked, killing hundreds in Damascus suburbs.
Kosovo, Iraq, Libya
Obama has some other options retaliatory strike Syria legalized, in addition to ensuring NATO and the Arab League official endorsement.
Charter "on page 51 speaks of the" individual or collective self-defense inherent right, if an armed attack occurs against a member of the United Nations. "In theory, Turkey or Israel may ask the United States and its allies as" self-defense "to assist cross-border violence in Syria, the two countries are facing a two-year civil war.
However, article 51, UN diplomats say that it may be difficult to explain based attack did not directly affect Syria's neighbors, the United States or its allies responses.
There in 1950 of the "Uniting for Peace" resolution, calling an emergency meeting to allow for international peace and security related issues, when the differences between the permanent members of the Security Council deadlocked UN General Assembly.
The resolution that the U.S. and its allies are trying to prevent the Soviet Union to use its UN Security Council veto power to cut off support for the UN mandated forces in the Korean War from 1950 to 1953.
UN diplomats said the United States would most likely not to "unite the peace." But it is possible from the General Assembly in the form of non-binding resolutions in order to help legitimize Syria, Washington could seek political support.
Although it does not carry the legal weight of the UN Security Council authorization, a General Assembly resolution can be proved that supports most of the world's revenge - Washington secured enough support to institutions in 193 countries. A majority of all the Assembly vote against the Syrian Assad country, although in the final vote, the majority narrowed.
Assembly option has potential, McGowan said.
"China and Russia will rage against any missile attack on Syria, but they may be severely outnumbered United Nations," he said. "The General Assembly may provide political support for military action, even if the Security Council is paralyzed."
But mounting option may take some time, it is not clear if Obama is willing to wait, if he decided to retaliate. There are also options for the approval of the General Assembly, strikes have been carried out.
Last year, the International Committee of the Red Cross described the conflict in Syria civil war, this means war, the Geneva Conventions apply. Gas may be war crimes or even crimes against humanity, UN diplomats said.
United States and its allies have carried out more than a decade of military action, they say, have an international mission, Moscow refused.
Russia believes that the NATO action in the Kosovo war is illegal. Also complained that NATO's action in 2011 to protect civilians in Libya, resulting in the death of Libyan dictator Muammar Gaddafi in an attempt to oust him rebel hands.
From the 2011 UN Security Council vote on Libya Moscow abstained, allowing UN mandate what analysts say is the first implementation of the UN "responsibility to protect" populist. Since then, the United Nations is often cited Libya blocked grounds for action against Syria.
Russia also cited the 2003 US-led invasion of Iraq conflict, former UN Secretary-General Kofi Annan once described as "illegal", as an action against the United Nations against Syria. In this conflict, Washington called a "coalition of the willing" against Iraq cached in the country of weapons of mass destruction, false accusations.
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