The London Underground During World War II
In WWII, the Underground was of special importance. It was fitted with flood gates in case it was bombed, and the Thames River breached the system. People by the thousands sought shelter in the tubes during Nazi bombing raids. They were used as a subterranean factory.
Supplies poured out to allied forces from these protected bunkers. There is so much history in the London Underground, and the more you learn about it, the more you can appreciate the sacrifices that went into making it a reality.
Also published on Medium.