Star Trek Online players will want to check back into the game to experience the massive changes that have arrived with Season 6: Under Siege. The new content brings a bunch of new features into the game including the ability for fleets to construct Starbases. In addition, there is new high level content and big Foundry updates as well.
Fleets construct their own Fleet Holdings with Starbases. Fleet Officers assign specific Fleet Projects for members to carry out in order to build their Starbase and master three specialization tracks: Military, Engineering, and Science.
Fleets can also improve Starbase specialization through five tiers of design, unlocking new Fleet Projects to earn more Fleet experience points and rewards. Functionality items to Starbases include Transwarp gates that allow for rapid access to different sectors.
Read more about the changes on the Star Trek Online site.