Module Y2 is a super-sized followup to Module Y1: The Early Years. It has more ships and scenarios than Module Y1, and highlights the early history of a much-ignored empire: the Interstellar Concordium. A deep look at the formation of the Interstellar Concordium is taken. The member races started as a group of squabbling mini-empires fighting over limited resources, yet eventually developed into a powerful empire devoted to keeping the peace. But the other empires introduced in the first Early Years module are not forgotten. All get new ships, new classes, and further development in their fleets and histories.