The Mirage G was an oddball. It was neither an interceptor nor a ground pounder nor a naval aircraft - because it never any RFP attached to it by the French military.
D'oh ! I've just realized I was completely wrong there. Silly me. YES, the Mirage G had a requirement attached to it. It did not come out of nowhere, as a Dassault private venture to screw AFVG. This is an urban legend, somewhat.
The 1964
DAFNE (cute acronym !) was very much a F6D Missileer / F-111B / F-14 Tomcat wannabee, for Foch and Clemenceau carriers.
DAFNE mean "Defense Aerienne des Forces Navales... and the "E" meaning escape me but you get the point.
"Air Defense of Naval Forces" ADNF in english.
Just like the Missileer, F-111B and Tomcat "long range air defense of carrier task forces".
Breguet proposed their 1200 project for it
(note: the future Jaguar was next in the projects list: the same year 1964,
1210 become
121, then Breguet winning entry into ECAT the next year, May 1965: the "supersonic trainer attack plane" that led to the Jaguar)
And Dassault created the Mirage G.
I have the very old but still pertinent book "Les avions Breguets" in Pdf, I will post the Breguet 1200 DAFNE soon.
Well, no need - because of this >
https://www.secretprojects.co.uk/threads/aeronavale-projects-early-60s.445/