Do you mean a landing in Caucasus? Or landings around the med in general?
Neither should really be a big problem, Caucasus should be covered (over land) by taking (and retaking) Ukraine (and W.Russia) as Russia. Land your planes in Caucasus and build enough units there to be sure.
Landings in Africa / Middle East are abit of a pain, but should be fixable in a few turns with some US help (and those are germans not going to Russia)
