The United Systems of Sol

Humanity has advanced to the 32nd Century, accomplishing a vast amount of technological break thoughts and expansion across was is later named as the Terran Quadrant of the Milky Way galaxy. Establishing itself as a dominant civilization among the vast amount of other extraterrestrial civilizations across the galaxy.

However without warning, the other three quadrants of the galaxy suddenly disappear and are replaced with an entire different galaxy with different star systems. Loading contact outside the Terran Quadrant, humanity sends out it's forces to investigate and discover the truth. They're no longer in their home galaxy.