Defeat of Islamic State in Raqqa may herald wider struggle for U.S.

WASHINGTON (Reuters) - The defeat of Islamic State in its de facto capital Raqqa may only be the start of a wider struggle by the United States to contain any insurgency launched by the militant group and to stabilize the region, as Washington grapples with defining a comprehensive strategy in Syria.

U.S.-backed militias declared victory over Islamic State in Raqqa on Tuesday, raising flags over the last jihadist footholds after a four-month battle. The Sunni militant group often referred to as ISIS, overran Raqqa in January 2014, seizing control from rebel factions opposed to the rule of Syrian President Bashar al-Assad.

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