Written by Jim Shooter, David Michelinie, Steven Grant, and Roger Stern
Penciled by Alan Kupperberg, Bob Hall, Alan Weiss, Sal Buscema, and Allen Milgrom

The end of an era! They say pride comes before the fall, and this
tumultuous tome is proof of that! When long-standing and founding
Avenger Hank Pym - in his guise as Yellowjacket - demonstrates reckless
behavior in battle, his fellow members schedule a formal court-martial
hearing to determine the fate of their emotionally conflicted comrade.
Will Yellowjacket triumph over his inner demons - or crumble under the
pressure of being an Avenger? Collecting AVENGERS (1963) #212-230.

This might be worth picking up. I haven't read it and I'm sort of curious as to how the Avengers even have real authority for any kind of court martial back in that era.

Well, the Avengers can throw anyone out of their little club that they'd like... but Hank's "trial" is in federal court for treason.


TJB

Like during the Kree-Skrull War, when the current Avengers disbanded, just because the "Big Three" said they had to. Of course, those Big Three were Skrulls but, yeah, the Avengers were private club (until Peter stopped by...)

Oh, no doubt. It just sounded like a legal hearing and I know the Avengers have been under the UN umbrella before.