The Internal Macedonian Revolutionary Organization (IMRO) was a revolutionary group founded in the late 19th century in the region of Macedonia. Its primary goal was to achieve independence from the Ottoman Empire and promote the rights of the Macedonian people. The organization played a significant role in the struggle for national liberation and was involved in various uprisings and guerrilla activities. IMRO was influential in the early 20th century, particularly during the Balkan Wars and World War I. The organization had a complex relationship with different political entities, including Bulgaria and Serbia, and its legacy remains a topic of debate in the context of Macedonian national identity.