UA: Referendum: Upon annexing or

puppeting a city, a Courthouse is constructed in that city where a referendum ("Does this city want to join Russia?") is held.
If the referendum succeeds, only half of the usual Warmonger penalty is inflicted, the city and Russia's

Capital enter a

WLTK-day, +1 local city

happiness is granted (until it is recaptured by its original owner), and all

resistance is removed from the city (allowing it to produce stuff immediately).
If the referendum fails however,

resistance time is increased (x1.5 the usual amount), and +4

unhappiness is added within the city until it is recaptured by its original owner. (remember that there is no resistance unhappiness due to the free courthouse)
Additionally, all workers gain the 'Migrant Worker' promotion, which allows them to enter rival territory, even without open borders.
(Calculation of the referendum: Base = 10-20% (random) success chance; Russian uniques increase the success chance of the referendum. See below for the details)
UU: Little Green Men (replaces the Riflemen): Has the same

production cost as a rifleman. Has 1 more

movement point than the Rifleman which it replaces. Has 32

combat strength compared to 34.
Gains the 'Suprise Attack' promotion, allowing the unit to gain double

movement points upon the declaration of

war to another Civilization (If another Civilization declares

war on you this bonus does not apply). (Increases the referendum's success chance by 8% for every Little Green Men next to or in the city).
Litte Green Men never obsolete, though their

training/production costs increases for every infantry-technology discovered after Rifling (=80% of the production cost of the latest discovered infantry-unit (Great War Infantry, Infantry, and Mechanized infantry))
UI: Russian Township (may only be constructed in rival Civilizations' borders; can't replace

Great Person Tile Improvements): +1

gold and +1

food. Removes forests and jungles. Cannot be constructed in a civilization's borders when at

war with them.
Upon declaring

war, all tiles within that Civ's border with a Russian Township turn into Russian territory. Additionally, they also increase

combat strength by 20% from any Russian unit stationed on that tile. If peace is negotiated at any time with that civilization, all tiles with the Russian Townships are returned to that civ.
(Referendum's success chance is increased by 8% for each Russian Township within the city's borders.)