What's set rally point do and how is it useful?
set Rally Point is created by clicking on a map, it is that point on the map where the newly created unit will move automatically to that particular point, this option is for a individual city,
Set Continental Rally point is set for all the cities on a particular continent,
i.e unit created from all the cities on that particular continent will move to that particular location.
These option are useful during war times, Select the option and place it on a city which is close to ur enemy border, why? because as soon as the units are created they will move to that particular city
this is helpful when u hav large number of cities in your empire.Its kinda reuniting your units once created and that point can act as a starting point for your newly created units.
But see to it that those cities rally point are not selected which are creating workers or settler because u dont want ur non combat units moving around undefended near enemy territory and my fall prey to emeny units.
Sorrry if u find any mistake in my language...