For the Covert War mission, we each place an objective. We then roll for a victory condition. In our case, holding an objective in the enemy deployment zone was worth victory points, but holding your own was not. You hold an objective by having more of your models than enemy models within 2" of it at the end of the 5th battle round. In the event of a tie, the person without the strategic advantage would win a minor victory. I had the strategic advantage (as I won the roll off), so I could choose which side to deploy on.
A handful of Renegade Astartes of the Crusaders chapter are engaged in a covert war on the Imperial world of Kappa Epsilon Kappa. A computer terminal inside the door of the a ruined shrine may contain vital intelligence for the Crusaders, if they can access it. Unfortunately, knowing the value of the terminal, a mixed group of Salamanders marines guards the shrine. The Crusaders warband gathers, hiding, in a ruined cathedral across from the target of their raid. If they are to gain an advantage in the larger conflict, they must gather the intelligence from the shrine's computer terminal while also protecting their staging area in the ruined cathedral, since it contains items and equipment that could be used by the Salamanders to learn about the warband's covert activities.
At this point, both kill teams break off the engagement. The renegade Crusaders and loyalist Salamanders have both captured the objective in enemy territory, gaining vital intelligence. Because the Salamanders were at a strategic disadvantage to begin with, the draw is considered a minor victory for the loyalist side.