Episode 12 of The Trigan Empire
The Reign of Thara
aka Battle for Trigan City
A Tale of Treason (Hawk reprint)
De slag om Trigopolis (Dutch title)
The Battle of Trigopolis (Dutch title, translated)
Written by Mike Butterworth
Illustrated by Don Lawrence
The Reign of Thara was originally published in 19 instalments in issues 298 (30 September 1967) to 316 (3 February 1968) of Look and Learn magazine.
It was reprinted in 1975 in 5 issues of Vulcan comic.
It was reprinted in 1978 in The Trigan Empire (Hamlyn/Chartwell).
It was reprinted in 1989 as A Tale of Treason in Tales from the Trigan Empire (Hawk).
It is reprinted in Volume 3 of The Trigan Empire—The Collection (the Don Lawrence Collection).
It is reprinted in Volume 1 of The Rise and Fall of the Trigan Empire (Rebellion).
Plot summary (Dutch)
MediaFire via British Comics Compilations