Complex sentence: The assault lasted from 9 to 20 March but failed to dislodge the Greeks and resulted in only small gains like Himarë, the area of Mali Harza and Mt.
Split into simpler sentences: The assault lasted from March 9 to March 20, but failed to dislodge the Greeks. The attack only resulted in small gains like Himarë, the area of Mali Harza, and Mt.