On a typical day during the Second World War, Winston Churchill, as Prime Minister and Minister of Defense, issued numerous memos to the ministers and service commanders on different subjects, on both the grand strategy and the detail of the war effort. It was not just his work rate and his self-confidence which allowed him to do this. He had a unique and intimate inside knowledge of all three services which allowed him to assess their real needs - a crucial task when money, material resources, and especially manpower, were reaching their limits. No defense minister in modern times has faced...