Complex sentence: According to some sources, Italians wanted to reward Chetniks because they agreed to participate in the operation (Case White) against Communists and allowed Chetnik attacks on Muslim population in Sandžak and Montenegro.
Split into simpler sentences: According to some sources, Italians wanted to reward Chetniks because they agreed to participate in the operation (Case White) against Communists. This allowed Chetnik attacks on the Muslim population in Sandžak and Montenegro.