An army with the Reconnaissance Force Disposition facing one with Purge the Foe is dealt Triangulation as its primary mission.
The opposing army is not playing the same mission: it is dealt Consecrate. Reading only your own card is how a game gets lost from in front.
Reconnaissance against Purge-the-Foe. The Triangulate action (Shooting phase from the second battle round onwards; a friendly unit within range of a non-home objective; once per turn; completes at end of turn if the unit controls that objective) triangulates the objective and places one of your operation markers within range. From the second battle round, non-home control pays at the end of your Command phase, and end of turn pays a tier on how many objectives are triangulated (one, two, OR three or more - only the highest tier scores). End of battle pays a large bonus for holding four or more objectives.
Primary scoring is capped at 15 victory points in a battle round and 45 across the game.