Complex sentence: Davidson was posted to No.14 Squadron in the Middle East, scoring his first victory with them, by driving down an enemy observation plane out of control at Beit Hanum on 23 September 1917.
Split into simpler sentences: Davidson was posted to 14 Squadron in the Middle East in early 1917. He scored his first victory with them, driving down an enemy observation plane out of control at Beit Hanum on 23 September 1917.