Columbia subject headings:
Harvard subject headings:
IS (Organization)
Syria--Foreign relations--Turkey--21st century.
Syria--History--Civil War, 2011-
Syria--Military relations--Turkey.
Turkey--Armed Forces--History--21st century.
Turkey--Foreign relations--Syria--21st century.
Turkey--History, Military--21st century.
Turkey--Military relations--Syria.
Princeton subject headings:
Syria--Foreign relations--Turkey--21st century.
Syria--History--Civil War, 2011-
Turkey--Foreign relations--Syria--21st century.
turkey history mil