Some more details on Frederick's death in this writeup:
https://www.westpointaog.org/memoria...2-85174f1b5bfa
In June, 1944 "Fred was sent to the Central Pacific Area as an observer for Headquarters. Army Ground Forces. On June 24. 1944, Fred requested a Field Artillery battalion commander to permit him to fly as an observer in one of the battalion's liaison aircraft, so that he could actually adjust artillery Are from an Air O.P. The Battalion Commander tried to talk Fred out of going up, because enemy action was heavy and the air traffic around this unit's air strip was particularly thick. However, Fred, being the soldier he was, insisted on going up and the Battalion Commander finally agreed. The pilot, with Fred as his observer, took off in an L-4 aircraft; they had no sooner gotten into the air when they and a B-25 bomber, coming in to land, collided. Both Fred and the pilot were killed."
Were L-4s directly "attached" to the artillery units and not separate Liaison Squadrons? B-25s in 7th AF or Marine PBJs?