It's true! Militaristic city states now gift unique units.
You can see which UU a specific Militaristic civ will grant you by hovering the cursor over the word 'Militaristic' when you open the diplo panel for that city state.
They will only gift you the UU under the following circumstances though:
a) You must be allied - being 'friends' is not enough
b) You must have required resources available (e.g. you would need Horses available to get a Keshik, Iron available for a Legion etc)
c) You must already know the prerequisite technology (e.g. you would need Chivalry for the Keshik or Iron Working for the Legion) and it must be current (i.e. you will stop receiving Keshiks as soon as you research Military Science and you would stop receiving Legions as soon as you research Steel)
For as long as it
can give you a Unique Unit, a Militaristic city state will
always give it every time without fail.
The Unique Unit will also always be the UU of a Civ that is not in the current game (so this can tell you in advance who you will not be meeting if you haven't met all the AI civs yet)
Bearing in mind the guidelines listed above, Militaristic CS's now add a much richer strategic dimension to the game than they did before.
Great addition IMO!
