A terror attack on a Moscow suburban concert hall killed more than 130 civilians on March 22. The Islamic State Khorasan (ISIS-K) claimed responsibility that same day, followed by body camera footage to prove it. ISIS-K is a predominantly Afghanistan-based branch of ISIS, with a massive deployment on the Afghanistan-Tajikistan border, which has a long and bloody history with Russia. After wars against Muslims in Afghanistan and Chechnya, Russian, Iranian, and Syrian forces decimated ISIS in Syria, and ISIS has retaliated a number of times against Russia’s soft targets.
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