The Moskva Academy is a story, or several, set onboard the Kali-class Super Dreadnaught TRS Moskva starting from approximately four years before the Fall and continuing on after.
The story follows a cohort of cadets through their time training on the Moskva. When the Fall occurs, they manage to stay alive and take the ship on the run, slowly gathering loyal members of the Terran Navy and making connections with other forces working to stop what is happening.
Eventually, with a majority of Bastions either compromised or out of commission, the Moskva becomes the largest extant Terran ship, and a beacon for Terran loyalists. This also provides the crew with leverage when convincing the disparate Terran forces to unite with League forces under McKenzie.