Continuity mistake: When Lightning drives off to meet with Sophia for the first time, he gets into a Jeep with the number 20860779, but when he arrives at Sophia's house, the Jeep has the number 20207765.
Factual error: When the German fighter ace (called "Pretty Boy" buy the Tuskegee Airmen) attacks the B-17s, he says "Brecht ein und zieht die Kämpfer ab!" What he wanted to say is "Break through and distract the fighters" but his choice of words is more like "Break into a home and steal from the brawlers!"
Factual error: The Me-262 fighters the 332nd engaged at the end of the movie were armed with 30mm cannon. A hit with one of those shells was enough to bring a B-17 down. An explosion of one in a P-51 cockpit would have shredded Lightning instead of leaving a neat bullet wound in his chest.
Factual error: On their way back to base, Lightning and his wingman encounter a German destroyer. Unfortunately, at this period in the war, there were no German destroyers in the Mediterranean, and certainly not any with a straight single stack. All German destroyers were built with two racked funnels.