A semi-hypothetical scenario of the Japanese attack on Rangoon early in 1942. In this case, a mixed Allied force is defending the city from air attack. The IJA is trying to gain control of the skies and bomb the defenses to enable a coordinated ground-naval assault. This was one of the first encounters between the AVG and IJA where the Japanese started to develop tactics to counter the stronger, faster US fighters. It was also one of the last desperate stands for the British-led forces before falling back to India.
In real life, the Allies were facing much older and slower Japanese planes. Since we do not have these available, A6M Zeros and Ju-88's (as Betty bombers) are being used, but in smaller numbers than actually took place relative to the Allied planes. The situation being depicted is that after an initial bloody nose was delivered by the AVG and RAF, the Japanese pulled in stronger air assets (using more modern aircraft) to wipe the skies over Rangoon clean so they could take the city.
Commentary: This is still a tough event for both sides. Fighters will meet co-altitude which is good for the IJA, but numbers are much closer which gives the IJA fewer options - the balance of close escort to sweeps is much keener.