Mare Nostrum is the newest expansion to Paradox Development Studio’s best-selling
historical grand strategy game, Europa Universalis IV. You now have even more tools at
your disposal as you guide your nation through the early modern world. As its name
suggests, Mare Nostrum introduces new systems connected to naval warfare and control
of trade. The power of your fleets will depend on the number of sailors your nation can
gather, and your ships can now be given missions and areas to patrol. There are also new
options for creating trade leagues, and a host of other improvements.