Liberation of Bulgaria

The treaty forced the Ottoman Empire to give back to Bulgaria most of its territory conquered in 14th century.

The first part was the Principality of Bulgaria, which functioned independently but was nominally a vassal of the Ottoman Empire and was limited to Moesia and areas adjacent to the capital, Sofia.

The third and largest part—all of Macedonia and Lozengrad—were restored to the Ottoman Empire, while some outlands were assigned to Serbia and Romania.

Those territories seized from Bulgaria after the Congress of Berlin, including most of Macedonia, Thrace, and others, had a majority ethnic Bulgarian population.

On 6 September 1885, Eastern Rumelia became part of the Principality of Bulgaria after a bloodless unification, although the principality was a de facto independent nation but de jure vassal nation of the Ottoman Empire until 1908, when Bulgaria proclaimed its declaration of independence.