Churchill never defined credible war aims beyond the defeat of the Axis; when the tide of battle turned, this would become a serious weakness of his leadership and a threat to his domestic popularity. But in 1940–41 his foremost challenge was to convince his people that the war could be won. This became more difficult, rather than less, once the Luftwaffe was vanquished: thoughtful people recognised that the nation remained impotent to challenge German dominance of the Continent.
