Alright, so you're asking about the big themes for that pairing on AO3? It's a real minefield, and honestly, most of it is incredibly dark. You don't get fluffy coffee shop AUs here. The dominant theme is almost always a toxic, obsessive power dynamic wrapped up in historical allegory.
It's less about romance and more about dissection—using the personified countries to explore the brutal mechanics of domination, betrayal, and ideological warfare. The 'romance' is usually a horrifying metaphor for the Molotov-Ribbentrop Pact: a temporary, deeply cynical alliance built on mutual exploitation that everyone knows will end in a brutal backstab. The stories are saturated with imagery of cold war rooms, shared maps stained with blood, and conversations that are just verbal chess games.
You also see a lot of 'enemies to even worse enemies' or 'failed reconciliation' plots. The aftermath of WWII is a huge playground—exploring occupation, war guilt, and the unbearable intimacy of victor and vanquished. It’s grim stuff, often leaning heavily into psychological horror rather than any traditional fanfiction tropes.
Frankly, I sometimes scroll past them because the atmosphere can get so suffocating. It’s fascinating as a character study of historical narrative, but it’s not for when you want something uplifting.