[stukapilot]

AGON was set up in accordance with the soviet GKO (State Defense Committee) decree in june 1944 and was subordinate to the chief of the soviet military mission in yugoslavia, lieutenant-general N. V. Korneev and an squadron (эскадрилья) of 12 Yak-9DDs escorted those cargo aircrafts from august. but i can't find any russian info to point out the loss of those fighters in that period.
and about AGON: it's the abbreviation of russian "Авиа-Группа Особого Назначения", literal translation is "air group of special purposes". but Leendert, i have to say that Авиагруппа (Aviagruppa), strictly speaking, is not equals to Group. Aviagruppa is just a temporary formation under the single command, especially for those reserve, transport or task groups. one Aviagruppa always consisted of 3 —8 regiments while the AGON in Bari had only 12 transporters for a squadron.