The US is showing up with 4 times as many cruise missiles as Iran has total launch systems, on day one. The US has a working supply chain to bring more. Iran won't have a supply chain from anywhere, and construction won't be an option without materials, which would also be targeted.
Iran has no chance of standing up to the US military, that's never really been a question. The only thing they can, and probably will do, is cause some losses to the Navy and any land troops. Unlike Iraq or Afghanistan, the US will take serious casualties if it goes into Iran. That won't be enough to stop the invasion, or really even slow it down. Internal politics would be a far more likely reason to stop any open invasion.
By definition LLM models need massive external input in order to improve. So they can't really be disconnected. Top that off with them only being useful when you can interact with them from many or remote locations, and there's just no way to really keep them secure. They need massive communication to accomplish anything useful, and there's no real way to keep massive communication secure.