For example, the M388 "Davy Crockett". https://www.youtube.com/watch?v=eiM-RzPHyGs https://www.youtube.com/watch?v=eiM-RzPHyGs (test footage) While that test

For example, the M388 "Davy Crockett". https://www.youtube.com/watch?v=eiM-RzPHyGs https://www.youtube.com/watch?v=eiM-RzPHyGs (test footage) While that test was successful, as far as I know, the project was stopped before it was ever a "production" device. I suspect his was because of the risk to the operator, as small mortar and similar nuclear devices could jam or otherwise fail to move away form the launch site. The whole concept of a nuclear mortar seems like an idea that sounds good on paper, but probably has all kinds of problem and subtle risks in implementation.