Why the Latest ISIS Battlefield Victory Matters

The latest battlefield victory by ISIS could be its most significant all year.

More than 500 people were reportedly killed as militants advanced into the capital of Iraq's largest province, but U.S. officials looked to downplay the strategic nature of the victory, calling it a "setback."

Watch the ABC News digital original video above to learn more about the loss of Ramadi and what it means for the fight against ISIS.

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