The Frontier Pass is a one-time, 20-day onboarding event for Commanders at Ops 10-19. It has four event types: Extermination! (clear hostiles), Alliance Unity (alliance goals), Resource Master (mining) and Foundations of Power (station and research upgrades). Completing them earns Frontier Pass Points toward 20 milestones. Rewards include basic resources, Loyalty Points, Ship Parts, Ship and Officer XP, shards of Lieutenant Picard and Frontier Store currency. The pass does not return. When it ends you will not see it or any Battle Pass again until you reach level 18.
This is a one-time catch-up event for returning Commanders who meet the inactivity criteria. It starts automatically on your next login. Just claim your first Daily Briefing gift. Offers do not appear until you claim it. After that you get a daily gift (with shards of Epic Officer Gwen DeMarco), a 14-day milestone event paying Core Progression Materials and Rare Officer Unlock Tokens, catch-up store offers, and a Heroic event called Assume Command that needs purchases. The Daily Briefing and milestone rewards are free. It runs once per account and does not restart if you go inactive again. If you miss days, you keep access for the remaining days but may miss some rewards.
The Active Duty Recall Program is a limited-time First Contact Day event. You send your personal invite link, from the Invite button in the event, to inactive players. They must be Level 20+, inactive for 30+ days and in your own region. You must also be Level 20+ to invite. You earn points when they return, and extra points when they finish activities in the returning player event. Points give Unity Coins to spend in the Unity Event Store. Up to 20 returns count per inviter. The invite link only works on mobile (iOS and Android). The event runs 4 weeks, and the store stays open 1 extra week.