Original sentence: Gjorgi Pulevski (Macedonian: Георги [Ѓорѓи] Пулевски) was a textbook writer, lexicographer, historian and military leader.He also wrote the first “Slavjanomakedonska opšta istorija” (General History of the Macedonian Slavs) , completed in 1892, a large  manuscript with over 1700 pages.His ethnicity is unclear as he declared himself as both Bulgarian and ethnic Macedonian in different periods of his life.Pulevski took part in the famous Battle of Shipka Pass leading a squad of Bulgarian volunteers gathered together by him in the course of the Russo-Turkish War, 1877–1878.There are a number of occasions in which Pulevski was regarded as ethnic Bulgarian from Serbian , Russian  and Bulgarian authorities
Edited sentence: Afterwards Pulevski took part in the famous Battle of Shipka Pass leading a squad of Macedonian volunteers gathered together by him in the course of the Russo-Turkish War, 1877–1878.Gjorgi Pulevski (Macedonian: Георги [Ѓорѓи] Пулевски) was a Macedonian textbook writer, lexicographer, historian and military leader.He also wrote the first “Slavjanomakedonska opšta istorija” (General History of the Macedonian Slavs) in Macedonian, completed in 1892, a large  manuscript with over 1700 pages.There are еnough occasions, by wich Pulevski was regardet as ethnic Bulgarian from Serbian, Russian and Bulgarian authoritys