Once a side is in the game, it can never be totally removed. However, sides can become inactive.
SideProperty: active t/f
This property is true if the side is still actively participating in the game.
If the side has won, lost, or simply withdrew, this will be false.
Any units on a side not in the game are effectively frozen statues;
they don't do anything, and are untouchable by anyone else.
Defaults to true.
SideProperty: status lose/draw/win
This property tells how this side did in the game. Defaults to draw.
GlobalConstant: win
These constants are the different possible values for a side's status.
SideProperty: advantage n
Initial and min/max limits on advantage for the side. All default to the values of the corresponding global variables.