The Handschar was the largest unit, around 20,000 Bosnian Muslim volunteers.

The number of foreign Muslim volunteers in Bosnia was estimated at about 4,000 in contemporary newspaper reports.

In January 1999, Khattab began the formation of an "Islamic Legion" with foreign Muslim volunteers.

Osama Bin Laden was one of the key players in organizing training camps for the foreign Muslim volunteers.

In October 2003, its website was launched by Muslim volunteers during the holy month of Ramadan.

Arab and other Muslim volunteers who came to Iran were trained in camps run by the Revolutionary Guards.

He also helped recruit Muslim volunteers in the Balkans for the Waffen-SS.

Dr. Staar also foresaw the possibility of a long guerrilla war in which the Chechens might be aided by Muslim volunteers from neighboring countries.

He recruited Muslim volunteers for the German armed forces operating in the Balkans.

Bin Laden played a central role in organizing training camps for the foreign Muslim volunteers.