Overview
Ryza is the forge of plasma — its containment artifice envied by every other Mechanicus world and coveted by every ork warboss in reach.
Its foundries arm the Imperium's most demanding formations.
Repeated greenskin invasions have made its tech-priests as practiced in war as in ritual.
M41 and M42 status
Forge world of unmatched plasma artifice.
Besieged forge turning its every gun to its own survival.
Timeline
Plasma weapon consignments set segmentum supply records.
Twin Ork WAAAGH!s under the warlords Grax and Rarguts descend on the Ryza system in strength.
With Waaagh! Grax finally broken, the birth of the Rift brings a fresh daemonic invasion; Ryza turns its whole output to its own defenders.
Ryza fights on as a besieged fortress-forge, every cannon and round it makes committed to an all-out battle for survival.
Cartographic positions and several administrative details are intentionally approximate where published Warhammer sources conflict or provide no canonical coordinate system.