Ivaldi Primus

Ivaldi Primus is the only habitable planet of the Ivaldi system and a forge world of the Adeptus Mechanicus in the Vigilius sector. Ivaldi Primus is one of the three major forge worlds in the sector and is the closest one to the sector capital Turbela.

History
"System has one planet in Goldilocks zone. Planet wracked by high temperatures, high winds, and occasional radiation storms from solar flares. Assessment, ideal for forge world establishment."

- Mechanicus leader of 1422nd Expeditionary fleet

Coming of the Mechanicus
There are no known signs of Ivaldi Primus being inhabited by any form of sentient life before the Great Crusade. During the Great Crusade, after the induction of Turbela into the Imperium, the 1422nd Expeditionary fleet would search nearby systems for other inhabited planets. During this search, only 5 light years away from Turbela they found a planet that not only lacked any sentient life, but any forms of complex life due to the relatively regular solar flares from the systems star. Initially deemed a death world due to high winds and regular radiation storms, it was claimed by the Mechanicus for a forge world after the discovery of rich ore deposits in the other planets and asteroid belts of the system.

In 004.M31 a massive Mechanicus fleet arrived to begin settling the planet, setting up ore mines both on Ivaldi Primus as well as the other planets in the system. Massive cities of Manufactorums and refineries sprung up, even as the Horus Heresy began. The Mechanicus, entirely bent towards their task of turning the planet into a forgeworld all but ignored news from the rest of the Galaxy. It was not until after they turned much of the surface of Ivaldi Primus's moon Ivaldi Secundus into ore refineries in 010.M41, that the newly appointed Fabricator General began to review the vast backlog of messages. Upon realizing the scope and nature of the war raging through much of the rest of the Galaxy, the Fabricator General ordered the newly built manufactorums to begin emergency mass production of war supplies to be sent to help raise armies from nearby loyalist planets. Even Manufactorums still in the process of being constructed were put to work.

After the Heresy
By 031.M31 the last of the main manufactorums were completed and Ivaldi Primus began to operate at optimal production levels. Construction would continue for sometime however as the Horus Heresy had proven that Man could not depend on the Adeptus Astartes to safeguard it. One particular instillation was a city devoted entirely to the production and maintenance of Titans as, as a new forge world, Ivaldi Primus lacked a Titan Legion. The construction of a Titan however is a long process of centuries, fraught with ritual, and it would not be until after the advent of the 32nd Millennium that the Legion would be deemed ready for battle. With 20 Titans completed and more still in production, the Legio Ardens Aestus entered the rolls of Mar's, led by the Emperor class Warmonger Titan Ivaldian.

Also established on Invaldi Primus were the Vaults of Ages where technology recovered from ancient storage depots on Turbela are brought for study. One of the most sacred locations on Invaldi Primus due to the nature of the work, to be assigned to work there is a great honor desired by many Magos and Arch-Magos. They lie within vast vaults carved into one of Invaldi Primus's mountain ranges and protected by powerful void shields.