Revolutionary terrorism is arguably the most common form. Practitioners of this type of terrorism seek the complete abolition of a political system and its replacement with new structures. Modern instances of such activity include campaigns by the Italian Red Brigades, the German Red Army Faction (Baader-Meinhof Gang), the Basque separatist group ETA, and the Peruvian Shining Path (Sendero Luminoso), each of which attempted to topple a national regime. Subrevolutionary terrorism is rather less common. It is used not to overthrow an existing regime but to modify the existing sociopolitical structure. Since this modification is often accomplished through the threat of deposing the existing regime, subrevolutionary groups are somewhat more difficult to identify. An example can be seen in the ANC and its campaign to end apartheid in South Africa.