In search of original concepts

[PolarisGL]

I did it with Gettysburg and the leaving behind of artillery shells out of artillery guns represented how difficult it was to move artillery at the time.

[Panda]

Just to underline cpoulos' point about reforger sites, you'll find that if you have events creating units in a city, they will continue to be placed there after the city changes ownership. Non-city squares which are occupied by another player will not.