sentences:  Until the outburst of the Stara Zagora uprising of 16 September 1875, Nikola Obretenov actively took part in the preparation of the Chervena Voda detachment and the training of population in nearby villages.After the uprising's suppression because of Andrey Momchev's treason, more than 1,000 people were captured.On 27 September 1875 Nikola Obretenov hid in the house of Karamihaylov, an interpreter in the Russian consulate, who organized his escape to Romania.