Headquarters in WWII has dynamic events, one of which is defending the base from airborne attack
Sledgehammer Games is working on keeping Headquarters in Call of Duty: WWII updated and constantly fresh with dynamic elements.
One example of a dynamic event in Headquarters, shared by GameInformer, is that players will have to use anti-air weaponry to defend HQ from an enemy airborne attack.
In addition to dynamic events, GameInformer reports that SHG might update the HQ with seasonal-based events for holidays.
SOURCE: GameInformer