Story: "Invasion! Book One: The Alien Alliance" (80 Pages)

Credits:

Keith Giffen (plot, pencil breakdowns)
Bill Mantlo (script)
Todd McFarlane (pencils)
P. Craig Russell and Al Gordon and Joe Rubinstein and Todd McFarlane (inks)
Gaspar Saladino (letters)
Carl Gafford (colors)
Andrew Helfer (edits)

Feature Characters:

Adam Strange (last in Cosmic Odyssey #3; next in Starman Vol. 1 #5)
Snapper Carr
Amos Monroe (a self-professed con artist of New Orleans)
Moshe Levy (a student of Tel Aviv)
Carlotta Rivera (a fashion model of Madrid)
Fritz Klein (a ski instructor of Innsbruck)
Dexter Fairfax (a writer of children's books of Tunbridge; first appearance of latter five)
Vril Dox II (first appearance; the son of Brainiac; last in flashback in L.E.G.I.O.N. '89 #1)
Garryn Bek (first appearance; both next in flashback in L.E.G.I.O.N. '89 #1)
The Durlan (behind the scenes; last in flashback in L.E.G.I.O.N. '91 #23)

Guest Stars:

Tigorr
Felicity
Elu
Harpis
Ryand'r
Ynda (dies; all six last in Teen Titans Spotlight #15)
Broot
Schlagen
Doc
Green Man (all ten as the Omega Men)
Spectre (in between Spectre Vol. 2 #22 and #23)
Martian Manhunter (in between Justice League International Vol. 1 #21 and #22)

Supporting Characters:

Alanna
Sardath (both last in Cosmic Odyssey #2; both next in L.E.G.I.O.N. '90 #14)
Amanda Waller (in between pages 20 and 21 of Suicide Squad #22)
Maxwell Lord IV (next in Justice League International Vol. 1 #22)
Perry White
Jimmy Olsen (both next in Superman Vol. 2 #26)

Villains:

Dominators
Khunds
Commander Dral (first appearance; an officer in the Thanagarian Hawk Police)
Thanagarians
Durlans
Citadellians
the Gil' Dishpan
Okaarans
Psions
Kel Gand (first appearance; last in flashback in Valor #1), and five other Daxamites (all as the Alien Alliance)
the Spider-Guild
Garguax (between Doom Patrol Vol. 2 #12 and #17)

Guest Appearances:

Tasmanian Devil
Medphyl (last in Swamp Thing Vol. 2 #61; next in Darkstars #27)
The Lords of Order

Other Characters:

D'aran Tuu (first appearance; a Green Lantern of the planet El 'Sh 'Tai; dies)
The El 'Sh 'Tai (first appearance; an alien race)
Green Lantern of Purdaa (first appearance; dies)