In US war on IS, what would victory look like?

In US war on IS, what would victory look like?
Syrian Kurds, fleeing an onslaught led by the Islamic State (ISIS) group that prompted for an appeal for international intervention.

WASHINGTON - The United States has yet to explain exactly what victory might look like in its war against the Islamic State group, but it is becoming clear that success will depend heavily on political events in Syria and Iraq that are beyond its control, experts say.

The US strategy to "destroy" the IS jihadists is predicated on a series of high-stakes gambles that could take years to play out, particularly in Syria, where Washington is betting it can forge a dominant "moderate" rebel force.

The US administration is "recognising that it is going to take a long time even in the best case scenario," Karl Mueller, senior political scientist at the RAND Corporation think tank, told AFP.

Long haul looms

Despite dramatic images of fighter jets bombing jihadist targets, President Barack Obama and his commanders have warned repeatedly that Americans should brace themselves for a years-long struggle and that the initial air raids will not produce miracles.

"I think this is going to be a generational challenge," Obama said this week.

The president and his deputies hope the US-led air strikes in Iraq and Syria will serve as a firewall against the rampaging Sunni militants, buying time to build up local forces and fuel political momentum against the group.

"What our military operations can do is to just check and roll back these networks as they appear and make sure that the time and space is provided for a new way of doing things to begin to take root," Obama said.

Based on rough outlines offered by US officials, the war strategy is counting on defeating IS fighters first in Iraq through a combination of Kurdish forces, Iraqi army troops, Shiite volunteers and a militia or "national guard" of Sunni tribes - which does not yet exist.

And in Syria, Washington is pinning its hopes on training and arming a new rebel army, at a rate of about 5,000 fighters a year.

At that pace, it will take about three years before the force is big enough to prevail against the IS group, according to the military's top officer, General Martin Dempsey.

If the American-trained rebel force could push back the IS group, it might eventually topple the Damascus regime, but officials have not articulated precisely what they have in mind in Syria.

Hoping for change in Iraq

In Iraq, rolling back IS extremists will hinge not on weapons or tactics but on the Shiite-led Baghdad government giving up its sectarian ways and reaching out to the country's alienated Sunni community, analysts said.

Much is riding on Iraq's new Prime Minister Haider al-Abadi, who has yet to signal a dramatic change, said Marina Ottoway, a senior scholar at the Woodrow Wilson Center.

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