The Ilinden–Preobrazhenie Uprising, consisting of the Ilinden Uprising and Preobrazhenie Uprising, was an organized revolt against the Ottoman Empire from August to October 1903. It was prepared and carried out by the Internal Macedonian-Adrianople Revolutionary Organization, with the support of the Supreme Macedonian-Adrianople Committee, which included mostly Bulgarian military personnel. The name of the uprising refers to Ilinden, a name for Elijah's day, and to Preobrazhenie which means Feast of the Transfiguration.
The uprisings had as an aim the autonomy for Macedonia and Adrianople regions.