Battle for Withered Valley WH40k Cinematic Assault Squad 2

On a backwater Imperial desert planet, an artifact of significant importance was unearthed beneath a ruined city. A regiment of Cadian Guardsmen is deployed to protect the asset from a Chaos attack until further reinforcements secure it. The initial waves of infantry quickly land and spread out, setting up a perimeter. The only issue is that much of their heavy armor and artillery are still being unloaded from transport ships. Air support is spread thin, so the Guardsmen must find and delay the Chaos forces