The 1885 unification merged the Principality of Bulgaria with Eastern Rumelia, significantly expanding the Bulgarian state against Ottoman-era partitions.
Key Facts
- Date of coup
- 6 September 1885 (O.S.)
- Organizing body
- Bulgarian Secret Central Revolutionary Committee (BSCRC)
- BSCRC founder
- Zahari Stoyanov
- Bulgarian Prince
- Alexander I
- Territories unified
- Principality of Bulgaria and Eastern Rumelia
Location
Cause → Event → Consequence
Following the 1878 Treaty of Berlin, Bulgaria was divided into the semi-independent Principality of Bulgaria and the autonomous Ottoman province of Eastern Rumelia. Nationalist sentiment and agitation by the BSCRC, founded by Zahari Stoyanov, grew through press campaigns and public demonstrations in spring 1885, building pressure for formal unification of the two territories.
In autumn 1885, revolts broke out across Eastern Rumelian towns, culminating in a coup on 6 September 1885 (O.S.) supported by Bulgarian Prince Alexander I. The Bulgarian Secret Central Revolutionary Committee coordinated the uprising, leading to the proclamation of unification between the Principality of Bulgaria and Eastern Rumelia.
The unification expanded the Bulgarian state by incorporating Eastern Rumelia, challenging the post-Berlin settlement of the Balkans. It prompted diplomatic tensions among the Great Powers and neighboring states, and demonstrated that nationalist movements could alter boundaries established by international treaties without major armed reversal.