Post Office Department

The United States Post Office Department was a pre-War department of the United States government. The department was responsible for managing postal affairs.

Background
The department seal appears on the mailboxes in Fallout 3 and Fallout: New Vegas, and on the shoulder patch of the Postman uniform in Fallout 4 and Fallout 76.

Appearances
The Post Office Department is mentioned in Fallout 3, Fallout: New Vegas, Fallout 4, and Fallout 76.

Behind the scenes
In reality, President Richard Nixon's Postal Reorganization Act of 1970 replaced the Post Office Department with the independent United States Postal Service.