The US's Unconditional Surrender in the Cold War

The idea of a nuclear umbrella seriously has extended deterrents. It means that the US will use nuclear weapons to target an adversaries homeland in response to that adversaries conventional assault on US allies. The whole discourse here is A, it's all Putin and B, this war was unprovoked. Is there a way out? Or is the US really looking for unconditional surrender? What would a plausible peace deal look like?"