Sea of Tranquility

The Sea of Tranquility is a location on the Moon.

Background
A reference to the Sea of Tranquility appears on a placard in the Museum of Freedom, where it mentions soldiers had fought there to secure America's freedom.

Appearances
The Sea of Tranquility is mentioned only in Fallout 4.

Behind the scenes
The Sea of Tranquility is the English translation of Mare Tranquillitatis, a lunar mare.