Chains are semi-randomly generated, with different mission types and rewards each time they appear. Activity Chains are a series of missions and events that must be completed in order, building up to big rewards at the end.Send squads to 'infiltrate' certain mission sites, making the soldiers and gear unavailable for a time, but editing the mission’s sitreps as the squad becomes more prepared for the operation.The primary objective of Strategy Overhaul is to increase the number of impactful decisions the player can make on the strategy layer.