Open the game's manual (on the help tab of the game launcher, press the game manual link, which opens it in your default browser). Search the text for "Georgia" and you will find various references in there.
in the
CD Extended features section:
Quote:
New Nation added..... GEORGIA 2015
Georgia will now show up in the extended version of the game starting May 1991
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Or in the WinSPMBT version 9.0 Upgrade patch sub-section of the
Release History section, as one of the bullets there:
Quote:
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Georgian has been added as a new Nation to the extended version of the game starting May 1991
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New features are always announced in the
Release History section of the manual, latest version at the top of the list. Thus the release history is the goto place to see what has been added over time.
Therefore - I am guessing that its most likely that you only have the free demo of the game.
Or if you
do have the CD extended version, then you may be trying to set up a battle outside of Georgia's dates (i.e. before may 1991).