Quote:The first production version received a more powerful engine than the prototype and was designated the 'A6M2'. As it was first produced in 1940 - the Japanese year 5,700 - it became popularly known as the "Zero-Sen" ("Type 00 Fighter"). Two squadrons with 15 planes were sent to China in July 1940 for trials under operational conditions, and quickly eliminated all opposition. The effectiveness of the Zero was urgently and emphatically reported to Washington by General Chennault, commanding officer of the Flying Tigers, but his report appears to have gone unnoticed