The activities of the Americans and the British in oil had an historic significance which was not foreseen in 1913, but which assumed the greatest importance in the World War; for the oil drawn from these Mexican fields largely supplied the Allied fleets and thus became an important element in the defeat of the Central Powers.

In 1913, however, American and British oil operators were objects of general suspicion in both continents.

They were accused of participating too actively in Mexican politics and there were those who even held them responsible for the revolutionary condition of the country.

One picturesque legend insisted that the American oil interests looked with jealous hostility upon the great favours shown by the Diaz Administration to Lord Cowdray's company, and that they had instigated the Madero revolution in order to put in power politicians who would be more friendly to themselves.

The inevitable complement to this interpretation of events was a prevailing suspicion that the Cowdray interests had promoted the Huerta revolt in order to turn the tables on "Standard Oil," to make safe the "concessions" already obtained from Diaz and to obtain still more from the new Mexican dictator.
To determine the truth in all these allegations, which were freely printed in the American press of the time, would demand more facts than are at present available; yet it is clear that these oil and other "concessions" presented the perpetual Mexican problem in a new and difficult light.