The Fallout show is influenced by MASH, explains producer Jonathan Nolan. Based on the video games of the same name, Prime Video's post-apocalyptic adaptation depicts the aftermath of a nuclear war in a retrofuturistic society where survivors seek shelter in Vaults with the wasteland populated with mutated monsters. MASH, on the other hand, is a groundbreaking television show that ran from 1972 to 1983, following the staff of an Army hospital during the Korean War.
https://screenrant.com/fallout-show-mash-influence-inspiration/