Reward: The Ultramarines fortify the ground permanently: for the rest of the campaign, once per post-battle sequence the gang may take a capped repair-and-rearm at that territory for free, and gains a standing plus 1 to hold it. Claimable only once per campaign.
There is no ground the Ultramarines hold more stubbornly than ground they have sworn to keep. This sub-plot begins when your gang holds the same contested territory across three consecutive post-battle sequences without ever losing control of it — the line unbroken over the campaign. Prove that constancy and you fortify the ground for good: for the rest of the campaign, once per post-battle sequence you may take a capped repair-and-rearm at that territory for free, and you gain a standing +1 to any roll to hold it. The world becomes yours in truth. This sub-plot may be claimed only once per campaign.