Quote Originally Posted by hoom
Well, you could not spawn a ship right there for them to hop onto?
Or do whatever it was that makes the AI really want to capture certain cities to try & encourage the Casse stack to stay around.
That won't work. The AI never does what you want just because you set up the conditions to make it so.

Easier to just use move_character to transport a Casse stack across (beef it up with create_unit too if desired). Absence of a ship will stop them just moving back to Britain again, as well.