The Mexican expropriation of British and American properties in March 1938 marked the first time any oil-producing country successfully stood up to foreign companies who claimed to own oil properties in that country and who had the support of their respective governments. Totally reliant on overseas oil at a time when war seemed imminent, British officials responsible for policy toward Mexico immediately emphasized the importance of preventing other oil-exporting nations from following Mexico's lead. Washington also sought to make an example of Mexico--one that would guarantee respect for...