Violent acts by homegrown militant extremists in the U.S. have declined, but "lone wolf" attacks are on the rise. The post-9/11 legal and political landscape poses new challenges to law enforcement a…

The provisional Irish Republican Army, or IRA, is an outgrowth of an older group known as the Irish Republican Army, which fought an insurgency that successfully challenged British rule in the whole …

An overview of Peruvian terrorist groups, Shining Path and Tupac Amaru.

A profile of a militant Islamist Kurdish separatist movement seeking to transform Iraq into an Islamic state.

This publication is now archived. What’s the status of Iraq’s various militia groups?Despite repeated U.S. requests for them to disband, Iraq’s various ethnic and sectarian militias continue to exist…