To be clear, Anthropic was completely okay with their tech being used in war, including current conflicts. They just wanted a human making some decisions. The military didn’t want a vendor giving them restrictions on how to operate a tool, and since Anthropic’s restrictions could be a problem anywhere they appear among other military vendors as well, the government used the supply chain risk designation to say “this can’t be anywhere in our tools”.
After a contract had been negotiated with the exact terms that Anthropic pushed to keep in place.