Teenage Mutant Ninja Turtles (2011), Volume 19

Abducted from their planet millennia ago, the Triceratons are at last free to return home. They come in peace, but how will the world react to a Triceraton "invasion" in the heart of New York City? About how you would expect, especially when the Earth Protection Force gets involved. As the three-pronged attack begins in earnest, it's up to the Turtles to stop the conflict before it escalates into all-out war! Collects issues, Issue 76–80.