The failed coup against Turkey’s president will have ripple effects that extend far beyond the borders of the country.

An uprising within NATO‘s second-largest military — and the one that’s closest to ISIS‘ center of power — spells trouble for the international fight against the terrorist group, experts say.

Friday night, a faction within the Turkish armed forces calling itself the “Peace at Home Council” said they had seized power, taken over the government, and declared martial law.

They deployed forces onto the streets of Istanbul and Ankara, Turkey’s largest city and capital, respectively, and closed two major bridges leading into Istanbul.