Foreign fighters are individuals who are recruited to travel to a conflict zone or who choose to do so on their own in order to train and/or fight with a particular group. The motivation for this travel may be political, ideological or religious. Travelling abroad to take part in a conflict for such motivations is not a new phenomenon. However, this trend has become an increasing concern in the last decade as individuals from Europe and North America have sought to train and fight with Al Qaeda and its affiliates in places such as Afghanistan, Pakistan, Somalia and Yemen.