Original sentence: During the Greco-Turkish War, a conflict which followed the Greek occupation of Smyrna in May 1919 and continued until the Great Fire of Smyrna in September 1922, atrocities were perpetrated by both the Greek and Turkish armies, however, the Greek atrocities were on a minor scale compared to Turkish atrocities
Edited sentence: During the Greco-Turkish War, a conflict which followed the Greek occupation of Smyrna in May 1919 and continued until the Great Fire of Smyrna in September 1922, atrocities were perpetrated by both the Greek and Turkish armies