sentences:  On 24 January 1876 Nikola Obretenov and Georgi Apostolov crossed the Danube at Oryahovo and set off for Vratsa.There, taking into account the situation, Zaimov and Nikola Obretenov decided that he and Georgi Apostolov should return to Romania to buy weapons, which they could bring to Vratsa with reinforcements, when the uprising burst out.Nikola Obretenov and Georgi Apostolov, assisted by the Craiova revolutionary committee, bought weapons and ammunitions, and Hristo Botev passionately took up organizing the detachment.