I have read different accounts but still not totally clear who the main opposition in New Guinea was in 43 and beyond.I read that the IJN handled things but once became heavily involved in the Guadalcanal and Solomons campaign the Japanese Army sent air units and gradually took over the fight.Correct? I wonder as still read accounts of pilots downing Zeros in late 43 etc. Did remain a joint venture? Not a lot of clarity despite some reading.