Using the miracle of Google, I have discovered the answer
Posted by Joe on October 19, 2021, 4:01 pm, in reply to "No.
|According to George Lucas, the decision to make the film a prequel boils down to the fact that the creators didn't want to use Nazis as the bad guys again. ... With four films in the series so far, Indiana Jones and the Temple of Doom is the only entry to not feature a military presence as the enemy.J https://www.cbr.com/why-indiana-jones-temple-doom-prequel/
I don't see that that was necessary to avoid using Nazis, but whatever.