Powell said, "In the minds of the Russians the inevitable commitment of the United States in such a war would have come not directly or necessarily from the stationing of American marines in Germany, but, as it came in the previous two struggles, from the ultimate involvement of the United States in any war determining the future of Europe". Thatcher's belief in the nuclear hypothesis "in the context of the use of American bases in Britain to launch an aggressive attack on Libya, that it was 'inconceivable' that we could have refused a demand placed upon this country by the United States. The Prime Minister supplied the reason why: she said it was because we depend for our liberty and freedom upon the United States. Once let the nuclear hypothesis be questioned or destroyed, once allow it to break down, and from that moment the American imperative in this country's policies disappears with it".