During World War II, Ogilvy worked for the British Intelligence Service at the British embassy in Washington, DC. There he analyzed and made recommendations on matters of diplomacy and security. According to a biography produced by Ogilvy & Mather, "he extrapolated his knowledge of human behaviour from consumerism to nationalism in a report which suggested 'applying the Gallup technique to fields of secret intelligence.'" Eisenhower’s "Psychological Warfare Board" picked up the report and successfully put Ogilvy’s suggestions to work in Europe during the last year of the war.