Chechnya has been plagued by two wars and an ongoing insurgency since the fall of the Soviet Union. In recent years, Chechen militants have escalated attacks in the North Caucasus and revived bombings in Moscow.

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 of Ireland in the early years of the twentieth century.

A profile of the Liberation Tigers of Tamil Eelam (LTTE), a separatist terrorist group that seeks an independent state in areas in Sri Lanka inhabited by ethnic Tamils.

A profile of ETA, a terrorist separatist group operating in the Basque regions of Spain and France.

A piece about hidden Maoists and "tracking" the Indian Separatist Rebels

A profile of three IRA splinter groups that remain active in Northern Ireland.

A profile of the terrorist organization based in the southern Philippines.

Chechen separatist Shamil Basayev is one of several rebel leaders to die violently in recent years. His death leaves the future of the movement in doubt.

Andrei Babitsky of RFE/RL, one of the few journalists to have met and interviewed Chechen rebel leader Shamil Basayev, says his death may weaken the Chechen separatist movement, but will not kill it.

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