There are six total Soviet Power documents in the game.
Freedom Station Operational Report - 25 July 1970
Comrades, this report comes to you following an unprecedented discovery in the mountains of Freedom Station. our deep mine crew has broken into a massive cavern filled with incredible ruins and artifacts, the likes of which have never been found in the Motherland.
The workers that we acquired from the native population have become agitated following the discovery - they clearly know something about these ruins. We will begin working the prisoners around the clock, for I believe we're on the verge of an even more amazing discovery.
Communications from the Soviet Commander... they found ruins here!
Freedom Station Operational Report - 17 September 1970
At your earliest convenience, please acknowledge these communiques. We have received no directives since the discovery of the ruins.
Examination of the artifacts and scrolls recovered from the site continue. As impossible as it may seem, it appears we may have discovered the ruins of the legendary city of Kitezh.
There are also numerous references to some kind of messianic figure. If I'm interpreting the text correctly, he was a prophet who fled Byzantium sometimes in the 10th century. The inscriptions say that he carried with him an artifact of great power. For the time being, I have suspended normal mining operations. It is my intent to discover the truth behind this mysterious prophet.
Hmm, he mentions artifacts, as well as the natives... Jacob's people?.
Freedom Station Operational report - 13 October 1970
We now have heavy equipment in place within the main cavern and we intend to gain access to some kind of template, even if we have to rip down its ancient doors to do so.
While hundreds of artifacts have now been recovered and catalogued, two guard crews have gone missing in the mines. I've personally questioned the native prisoners - they claim to have no knowledge of the whereabouts of the missing guards. And though we've punished them harshly, I fear they are on the verge of revolt.
The Soviets lowered huge machines down into the cave... not exactly subtle methods...
Freedom Station Operational Report - 4 November 1970
Comrades, it is imperative that you respond to my communiques. We are now in dire need of supplies and reinforcements. A full revolt is in progress and the prisoners now control the excavation site and surrounding facilities.
In retribution, I have ordered mass executions of prisoners from the native population. With any luck, these rebels will lay down their arms and surrender to save their own countrymen.
The people of the valley revolted, but the Soviets only ground their boots down harder.
Freedom Station Operational Report - 12 December 1970
It is clear to me now that our communications have been sabotaged. You likely have received none of my cables for quite some time. But I will continue transmitting, as it is my duty.
Local natives attacked us on multiple fronts soon after we attempted to sway them with the executions of their countrymen. There are far more natives than we ever anticipated. It's clear they come from the other side of the mountain and have been preparing their revolt carefully for years. We are now without power and water and winter is upon us. Those of us who remain will soon be leaving. We have one train transport and we will take with us as many records and artifacts as we can.
The Soviets underestimated the people of the valley... and it cost them dearly.
Freedom Station Operational report - 20 December 1970
To any who receive this message, I will soon be dead, and with me all knowledge of this place.
Escape for us was never an option. We boarded the train and set out for the long journey, only to discover that mere miles from the mountain, the tracks we built upon the backs of so many dead had simply disappeared. For months now, the native population has carefully dismantled the railroad, intentionally isolating this place in preparation for their attacks. And like their precious ruins, I will soon be taken by the snows and forgotten.
Looks like the people of the valley got their revenge on their captors, in the end.