U.S. President Barack Obama's plan to defeat the Islamic State of Iraq and Greater Syria (ISIS) meets reluctant allies among the Arab League leaders, who are key players in winning the battle against the insurgents, experts say.

Despite late Sunday night's passing of the resolution to actively engage the extremists that have been claiming swaths of Syrian and Iraqi territories, the Gulf Leaders remain adamant in backing President Obama's call for a military campaign in the region.

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The Obama administration continues to lobby support from the Middle Eastern countries that according to experts are critical in defeating the caliphate-claiming militants.

Obama will unveil on Wednesday a three-year plan for defeating the extremists, which he promises will not plunge the Americans into another Iraq war. His anti-ISIS strategy excludes sending ground troops, requiring the formation of a pan-Arabic military campaign.

The anti-ISIS campaign will essentially rely on the Iraqis, the Kurds and the Syrians, said Fawaz Gerges, an expert on Middle Eastern studies, told CNN.

Secretary of State John Kerry is enlisting the leaders of the region to support the anti-ISIS coalition and Defense Secretary Chuck Hagel visited Turkey to lay out the coalition's strategies.

But Kerry and Hagel are expected to meet difficulties in enlisting Arab support.

"Trust is so low, especially in the Gulf region, for Obama's leadership quality and the way he manages foreign policy," said Mustafa Alani of the Gulf Research Center.

Alani explained that alliance with the United States would be a hard sell, saying that Saudi Arabia, Turkey and Qatar have been for years frustrated and furious at Obama's Syria policy. Washington's refusal to help in overthrowing Syrian President Bashar al-Assad has angered these countries in the last three years.

Still, having Saudi Arabia in the lead will make the anti-ISIS campaign legitimate, said former U.S. ambassador Dennis Ross.

It is the only political and religious authority in the region that has the power and legitimacy to bring down the Islamic State group, reported The New York Times.

TagsISIS, ISIL, Islamic State group, anti-ISIS coalition