Carl William Ackerman, Mexico's dilemma — Chapter 4 (1918)
“ Eternal vigilance is the price of peace at Tampico, the greatest oil port in the world. From the jungle sixty miles away flows the endless stream that propels and lubricates the Allied military machine; for the weapons with which the United States, England and France are fighting the dictators of the Central Powers in European waters, on land and in the air, are dependent upon Tampico for fuel oil, gasoline and lubrication. ”
