The transfer of foreign fighters into Iraq and Syria to join the Islamic State and other Sunni militant groups has been all but eliminated in countries across the world, according to intelligence assessments. In previous years, it has been estimated that nearly as many as 2,000 foreign recruits, both men and women, crossed into Syria each month, mainly from Turkey, with the intention of joining armed Sunni groups. By the end of 2015, it was believed that over 30,000 foreign nationals from close to 90 countries had entered Syria and Iraq to fight for one of the Sunni-inspired opposition groups taking part in the Syrian civil war. Most of these foreign recruits joined the Islamic State, which is also known as the Islamic State of Iraq and Syria (ISIS).
But current intelligence assessments produced by analysts in the US Intelligence Community suggest that the total inflow of foreign recruits has trickled down to a total of just 50 since the beginning of 2016. . .