In 1885, as a result of the unification of northern and southern Bulgaria without the consent of European powers, the political tensions in the Balkans successively increased. One of the consequences was the outbreak of Serbian‑Bulgarian war. The victory of Bulgarians paradoxically contributed to the deep crisis in the country and led to the abdication of Prince Alexander von Battenberg. A group of officers played an active role in these events. In August 1886 they carried out a coup d’état and the abdication of ruler. Soon a counter‑attack was organized, and the political power fell into the hands of politicians sympathizing with Prince Alexander. The dethroned ruler returned to the country. However, the persisting state of tensions and pressure from Russia forced the prince to abdicate again. The article presents the process of growing crisis of the Bulgarian state and the course of coup d’etat aimed at depriving the Bulgarian ruler of power, its consequences, as well as explaining the motives of conspirators.