If a unit has insufficient steps and one tries to move it in a certain direction more than once, there will pop up a message telling if there are enemies in the fow. If there are no enemies, there will be no pop up.
Look at the green crow in the north of 33320. Try to move a few squares east (at least two) once or twice, and the message should show up - probably because of the guard inside the neutral city. Then "move" to the three squares of fow just SE of the crow, and no message is seen.