Blackwater (now Academi): Infamous for its role in the Iraq War, accused of excessive force and civilian deaths.
Executive Outcomes: Operated in Africa during the 1990s, accused of human rights abuses.
Wagner Group: A shadowy Russian outfit linked to conflicts in Ukraine and Syria.
Aegis Defence Services: Faced controversy for alleged misconduct in Iraq.
Sandline International: Known for its involvement in the Sierra Leone civil war.