Though we basically already know the answer to that question, Waffen USS lost.

Magnitogorsk was the most important steel production center in USSR during the WW2 and one of the biggest in the world. Monument shows worker presenting the freshly made sword to the warrior.

Which is the same sword being also depicted on two other famous monuments: The Motherland Calls in Stalingrad, where she rises it into the air in the defence of the country (though the sword looks different because of different architect), and the War Memorial in Berlin, where the victorious warrior lowers the sword to the ground.

Source: manhwa "Tower of God"; character: Rak Wraithraiser (he's normally not like that)

Ending was pretty selfaware:

"He [General Bendikt of Cadian 101th] paused on the lip of the portal for one last look at Potence. The rebellion had been crushed, the Scourged had been thrown back and most importantly, Cadian honour had been restored. Some might call Potence a wasteland. But to the military minds of the Astra Militarum, this was peace."

Note: Potence is basically an agri world with one city (and it wasn't even a hive city) being quiet residence of sector-ruling noble house so disgustingly rich they are even named "Richstar". And the "wasteland" is unusual for 40k exaggeration, capital got devastated and millions died but rest of planet was implied to be not touched by fights.

In this day, the PKWN manifesto was proclaimed, outlining the ideas of the new socialist Poland.

They shall be our finest warriors, these men who give of themselves to the cause of proletariat. Like clay we shall mould them, and in the furnace of class war forge them. They will be of iron will and steely muscle. In great tank armour shall we clad them and with the mightiest guns will they be armed. They will be untouched by plague or disease of liberalism, no sickness of capitalism will blight them. They will have tactics, strategies and machines so that no foe can best them in battle. They are our bulwark against the Terror. They are the Defenders of Humanity. They are our Red Army and they shall know no fear.

I didn't even had to change this quote very much

"Decisive Lethality Platform" (are we the baddies?) but cheaper