My loose understanding is that WWII air combat was a lot more slashing then circles.Reminds me of what a B-17 crewman told me once. Aerial attacks on B-17 formations were rarely the continuous action seen in movies and TV. Due to the formidable defenses of a B-17 there was a furious wave of slashing attacks that lasted just a very few minutes (depending on the number of fighters in formation), then an interlude of several minutes while the enemy climbed back to altitude and formed for another attack. It was compressed in movies and TV for dramatic effect and to limit the running time.