The number of countries in which the Islamic State of Iraq and Syria (ISIS) is operating has more than doubled since 2014, according to a classified White House map obtained Tuesday by NBC News.

Two years ago, when the U.S. first began its campaign against the terror group, ISIS had a presence in seven countries. That figure rose to 13 in 2015, and today the White House document shows that ISIS is operating in 18 countries.

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The map of ISIS’s expansion reportedly comes from a briefing slide show from the National Counter Terrorism Center.