The Unity Committee (Единство, Edinstvo) was an organization supporting the Bulgarian population of Thrace and Macedonia, remained within the Ottoman Empire after the division of the San Stefano Bulgaria and the decision of the Berlin Treaty. First Committee "Unity" was established on August 29, 1878 in Veliko Tarnovo. Its main objective was enshrined in the Constitutive protocol: Unity of all Bulgarians and their wellness today. The initiative for this belonged to Lyuben Karavelov, Stefan Stambolov and Hristo Ivanov - Golemia. The task of this new committee was to establish similar committees throughout Bulgaria. Soon after Edinstvo was formed in Tarnovo, steps were taken to spread it to all towns in Bulgaria and Eastern Rumelia as well. People were also sent to Macedonia. As a consequence the Kresna-Razlog Uprising was organized.
- Doyno Doynov. Kresna-Razlog uprising 1878-1879: On its scope and results, internal and external political circumstances in which it starts, continues, and ends. Sofia. 1979. Published by the Bulgarian Academy of Sciences.