Earlier, I was able to invade Crete by sea from Morea (near Athens on the southern tip of Greece) with two infantry simply by selecting them and right-clicking on Crete as you would normally, I assume because I had a small fleet of three Galleys and three Cogs. It even showed them move first to the ships and then--after a short delay--onto Crete.
But now I've just conquered Venice and am trying to return home to Dalmatia via the Gulf of Venice. I have a large fleet in the gulf and control both provinces. When I select the army and right-click on Dalmatia, it makes sound like it will move but doesn't do anything.
There are a few things I suspect may be blocking the convoy:
The port is not actually adjacent to the gulf but on the sea below it. If this is the problem, do I need to split my fleet across both sea regions? Do both fleets need to have Cogs?
Venice has a fleet parked in a port adjacent to the gulf. Even though it appears I have them blockaded in the port, are they blocking the convoy?
I probably have more units in the army than Cogs in the fleet. Do I need to split up the army and move the stacks piecemeal?