They hit Boston is a paper note in the Fallout 4 add-on Nuka-World.
In the weapons bench room, on the roof of the World of Refreshment, next to Casey's password.
They hit Boston! This is really happening! Janie's college is out there. The hell with the evacuation protocols, I have to go find her.
Raul if you find this, sorry I couldn't stick to the buddy system. Good luck.