BAGHOUZ, Syria—U.S.-backed forces declared military victory over the ISIS terrorist group in Syria on March 23, after liberating the last pocket of territory held by the extremists, marking the end of a brutal self-styled caliphate, the group carved out in large parts of Iraq and Syria in 2014.

U.S.-backed Syrian Democratic Forces (SDF) fighters pose for a photo on a rooftop overlooking Baghouz, Syria, after the SDF declared the area free of ISIS terrorists after months of fighting on March 23, 2019. Maya Alleruzzo/Photo via AP
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