For decades, the US has been a major part of NATO's European security architecture...and for decades, US administrations have often wished they could divert more of those resources to other theatres. Some succeeded, but others found themselves pushing resources back to Europe in response to some new (often Russia related) crisis. Now the new US administration has made it clear that it wants the focus of US military capabilities to be on deterring the PRC, and for more of the European security role to pass to the European NATO allies. The question is, to what assets could the US potentially transfer, and how effectively could Europe replace them in the near term?