When the Japanese Zero first entered service in 1940, it was without doubt the most advanced naval fighter in the world and quickly earned a reputation as a ruthless dogfighter. In early engagements, the Zero proved so effective that pilots were able to post an almost unbelievable victory ratio of 12 to 1 against their adversaries.
As the Wehrmacht began its march across Europe in 1940, little attention was being given to developments in the Far East. Following years of re-arming and upgrading, the Japanese Navy could boast some of the most advanced naval aircraft in the world within its inventory, including the superb Mitsubishi A6M Zero.