Defiant

The discovery of the Ark ended the global civil wars. It took three years to get inside the massive buried ship, and within three minutes of opening the Ark, a message appeared on every electronic device on the planet,
War is coming, and you are not ready.
The map the Ark provided brought humanity to the First Contact War that nearly wiped out mankind. Slowly, humanity has begun expanding again, searching for clues of the true origins of mankind. Hoping to be prepared for a war that may never come, humanity has once again begun expanding into the galaxy.
While en route to join the Third Expeditionary Fleet, Defiant has found a powerful potential ally that may gain humanity access to the Galactic Alliance if they can keep them safe and somehow return them to their home world. Trapped in an uncharted star system as the star is collapsing into a black hole, Defiant has found an ancient enemy that has plagued the galaxy for millennia and must somehow survive.