The Romulan underground movement was formed sometime prior to the late 24th century on the planet Romulus by a group of Romulan citizens who opposed the Romulan High Command and who supported a Romulan-Vulcan reunification. Its methods and principles were similar to those of the Cardassian dissident movement which emerged in the Cardassian Union around the same time. Senator Kimara Cretak was involved in the operation to destroy the underground movement. (DS9: "Image in the Sand")