FDR Envoy Harry Hopkins Surveys London

Harry Hopkins, representing President Roosevelt, visits Prime Minister Churchill on a secret mission. He observes London's resilience despite its battered areas, noting that business continues almost as usual. Military experts predict Hitler's invasion of Britain, yet London remains calm, suggesting the war of nerves is ineffective. The transcript concludes with reflections on outdated techniques and the enduring spirit of London.

What forecast did military experts make regarding Hitler's plans?

What does the term 'war of nerves' refer to in the context of the situation in London?