Original sentence: He also deceived and led to their deaths thousands of Montenegrin citizens, led by Chetnik forces, in 1944 and was declared a war criminal by The State Commission for Establishing the Crimes of the Occupiers and Their Helpers in the February of 1945.He and his wife had their throats slit later that year in Judenburg, Austria.The Montenegrin national anthem was unsuccessfuly combined with the Serbian national anthem, "Boze Pravde" in alternating verses, in a futile motion to adopt this hybrid as the official anthem of the State Union of Serbia and Montenegro
Edited sentence: He and his wife had their throats slit later that year in Judenburg, Austria by Montenegrin chetniks.Some historians thinks his also deceived and led to their deaths thousands of Montenegrin citizens, led by fascist Chetnik forces, in 1944 and was declared a war criminal by The State Commission for Establishing the Crimes of the Occupiers and Their Helpers in the February of 1945.The Montenegrin national anthem was  combined with the Serbian national anthem, "Boze Pravde" in alternating verses, in a futile motion to adopt this hybrid as the official anthem of the State Union of Serbia and Montenegro