There are numerous possibilities, but this one comes to mind. Italy and Austria are allies in a "Lepanto" opening (against Turkey). In the spring of 1901, Italy moves a fleet, Naples to the Ionian Sea, and Austria moves its fleet, Trieste to Adriatic Sea.
In the fall of 1901, Italy wants to move an army, which "held" in Venice in the spring, to Tunis. Austria agrees to convoy it through the Adriatic Sea to the Italian fleet in the Ionian Sea, from thence to Tunis.
So Italy writes: "Army Venice to Tunis, via convoys in Adriatic Sea and Ionian Sea. Fleet Ionian Sea convoys Army from Austrian fleet in Adriatic Sea to Tunis."
Austria writes, "Fleet Adriatic Sea convoys Italian army in Venice to Italian fleet in Ionian Sea."
Is this a valid set of orders, and will it achieve the desired result?