Originally posted by Karnak Canaris,From what I've read the P-38 with the 37mm never fought.Further, not all cannon are equal and the 37mm on the P-39/P-38D was mediocre. Nothing like the NS-37 on the Yak-9T.We don't need the P-38D because it saw less WWII use than the Ta152H-1.The P-38F was the first significant model of that aircraft.