France's nuclear policy isn't unique in that they are willing to launch a first-strike (all the serious nuclear powers claim to be). France's nuclear policy is unique in that they are willing to use nuclear fire as a warning shot: before they launch their full strategic stockpile, they'll (probably) erase a military base or aircraft carrier with a tactical nuke. That lower threshold to break the nuclear taboo is what's interesting.

It's not the only country with that doctrine. See [1]. I think only China and India is no first use.

[1]: https://www.armscontrol.org/factsheets/nuclear-declaratory-p...

Yup. No other country had an official Force de Frappe.

France is never going to send a nuke to the US.