I know people, including relatives, who believe we’ve had a secret US Army Moon base since 1965.
Yeah. Just search on YouTube for Secret Space Program - there are several variations on the theme.
This one is the only one I’ve found so far on YT which is true - was personally involved back in the day (NSA - space/mil):
Secrets of the Soviet Space Program (Full Documentary) by Stacy Brimly
https://www.youtube.com/watch?v=XIJqZ6GBnLI
Obviously not the same relatives who think the moon landing was set up in a movie studio...:^)