18th Pursuit Group
18th Pursuit Group was based at Wheeler Field and comprised 6th, 19th, 73rd and 78th Pursuit Squadrons with P-40s. It formed part of 14th Pursuit Wing.
See also: 14th Pursuit Wing; P-40; Wheeler Field
You can find out more about the Air Force in the following Osprey books:
ELITE 46 US Army Air Force I; ELITE 31 US Army Airborne; ELITE 51 US Army Air Force 2; CAMPAIGN 62 Pearl Harbor 1941