Petroleum oils the Soviet Union's rusty gears.
Nodding donkeys bring the black gold up to the surface to pay for the glorious worker's life.
Near the drills, tenements exist to provide precious manpower.
Closer to the big cities, petroleum tanks hold large amounts of crude.
The precious oil is then sent in rusted pipes to the refineries on the Black and Baltic Seas.
Even with the great profits the humble hydrocarbon provides, building an empire around one substance is a dangerous game.
One little move in the oil market could spell trouble.
And trouble's coming.