The attack in Tunis is depressing - we seem to have an ex-post hypothesis for why Tunisia now.
More fighters have traveled from Tunisia to Syria and Iraq than any other country, especially if we adjust for Tunisia's population & distance from the conflict (under the conjecture that the neighbors or more closely located countries to the conflict will likely supply more fighters).
Virtually every country has supplied fighters to this conflict - but there's a handful which have made a disproportionate contribution. Here's a chart to illustrate:
More fighters have traveled from Tunisia to Syria and Iraq than any other country, especially if we adjust for Tunisia's population & distance from the conflict (under the conjecture that the neighbors or more closely located countries to the conflict will likely supply more fighters).
Virtually every country has supplied fighters to this conflict - but there's a handful which have made a disproportionate contribution. Here's a chart to illustrate:
