According to author Robert Cassidy, al-Qaeda maintains two separate forces which are deployed alongside insurgents in Iraq and Pakistan. The first, numbering in the tens of thousands, was organized, trained, and equipped as insurgent combat forces in the Soviet-Afghan war. The force was composed primarily of foreign mujahideen from Saudi Arabia and Yemen. Many of these fighters went on to fight in Bosnia and Somalia for global jihad. Another group, which numbered 10,000 in 2006, live in the West and have received rudimentary combat training.