Wiktionary
ultime avertissement
n. (context French nuclear policy English) The (l en recourse) to the use of limited, (l en substrategic sub-) or (l en prestrategic), (l en tactical) nuclear strikes as part of a (l en nuclear deterrent), constituting a “final warning” and the last measure before strategic nuclear (l en bombardment); (non-gloss definition: also), such a strike.