Units in Olympia move by first waiting the duration of the journey in
the starting location, then instantly jumping to the destination. One
can see units long after they have departed. An interrupted movement
order instantly brings units back to their starting location. Combat is
possible with units after they have left.
Note that most interaction with units, such as giving items and
stacking, is explicitly prevented after they have begun movement.
Combat is allowed up until the point a unit has actually moved out of a
location, however, so that units can't become invulnerable by constantly