UNSC Cartographer Initiative
From Halopedia, the Halo wiki
The UNSC Cartographer Initiative is a UNSC recruiting program for aspiring War Games simulation program map designers. With many departments stretched thin as the UNSC struggles to maintain a cohesive presence across colonized space, the military began the UNSC Cartographer Initiative to recruit much-needed map designers. This led to an influx of fledgling simulation environments incorporating new architectural ideologies and advanced tactical challenges to help keep the Spartan branch operating efficiently.[1]
Production notes
First mentioned in issue 68 of Canon Fodder, the UNSC Cartographer Initiative is the in-universe explanation for the presence of Forge maps in Halo multiplayer.