'Fairfax' was a British unrealised plan initiated by Brigadier G. M. O. Davy’s Land Forces Adriatic to base British ground and air forces in Yugoslavia (November 1944).

The tasks of this force were envisaged as blocking and/or harassing the German lines of communication through Dalmatia, and establishing an advanced landing ground or grounds near Zadar for subsequent development into a major advanced air base.

Lieutenant General Ira C. Eaker, commanding the Mediterranean Allied Air Forces, hoped that it would be possible to use Zadar to avoid the belt of adverse weather often encountered over the head of the Adriatic Sea. Logical though 'Fairfax' may have seemed to British minds, Marshal Josip Broz Tito, the Yugoslav commander-in-chief, was prepared to accept an air base at Zadar, but refused permission even for a reconnaissance in northern Yugoslavia.