Let me first post a brief recap on the Ghost Army.
I found it interesting as I don't think I knew all that.
When I first saw references to the Ghost Army, I thought they were about the fake encampments set up in Britain prior to D-Day.
But the Ghost Army was on the move in continental Europe, and their story was only declassified in 1996.
I hadn't realized how much had been previously concealed,
A few links:
http://www.americainwwii.com/articles/pattons-ghost-army/
http://www.ghostarmylegacyproject.org/
https://ghostarmy.com/