It's been exactly one year since the extremist group known as ISIS changed its name to "Islamic State" and declared a caliphate in parts of Syria and Iraq. The militants symbolically marked the occasion by obliterating part of the border between the two countries.
Less than a month before, on June 10, 2014, the extremists had surprised the world by capturing Mosul, Iraq's second largest city, from a fleeing Iraqi army.
Take a look at the timeline below to learn more about some of the major events in the group's lightning rise.
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