NASHVILLE, Tenn. (WKRN) — They’re often referred to as the unsung heroes of World War II — the Ghost Army. A mission that was kept secret for years but that undoubtedly saved lives.

This photo provided by the Ghost Army Legacy Project shows inflatable tanks in March, 1945. For decades, their mission during World War II was a secret. With inflatable tanks, trucks and planes ...

The team that worked in the secret installation outside of London is credited not only with cracking Enigma, but also the Lorenz, another device that the Nazi high command used to send coded messages.

Ann Kuster of New Hampshire, noted that Ghost Army veterans had to keep the details of their service secret, even to their families. She recalled how one discussed his service with relatives.