Great Britain's refusal to yield to Nazi Germany in the Second World War remains one of the greatest survival stories of modern times. Commemorated, evoked, and mythologized as it has been-chiseled and engraved onto countless monuments, the subject of an endless stream of books and films-its triumphant outcome was by no means predetermined. In December 1940, months after war was declared, the director of plans at the War Office in London was asked to draft a paper on how to win the war. He replied that he could only plan "for not losing."
Britain's War: Into Battle, 1937-1941 is...