400K?
During WWII, about that many German POWs were brought to the US for the duration.
About 25 years ago or so, a pirate ship (iirc) was recovered, and the owners wanted to put it on display in Boston.
Part of the history of the ship was that it once carried slaves, so the ship was tainted, and too unPC for liberals in academia and the LSM.
The pirate museum is along the coastline in Southern Mass and is wonderful. The owner and his wife run the place.