The military problem quickly resolved itself into two enterprises: carrying war to the enemy, and giving aid and comfort to its own forces--in this case the German navy. As the war progressed, and the opportunity for strictly military operations became less likely, the two Captains occupied their time in injecting a quite military flavor into the enterprises Bernstorff and Albert had on foot. As a strategic measure Mexico must divert America's attention from Europe and remove to the border her available forces. Meanwhile, German reservists must be supplied to their home regiments. Failing that they must be mobilized for service against Germany's nearest enemy here--Canada. German raiders at sea must be supplied. German communication with her military forces abroad must be maintained uninterrupted. Long after the departure of the principals for their native land the enterprises persisted. It may be well here to extend to the secret agents of the United States the tribute which is their due. To Chief Flynn, of the United States Secret Service of the Treasury Department, to A. Bruce Bielaski, head of the special agents of the Department of Justice, to W. M. Offley, former Superintendent of the New York Bureau of Special Agents, to Roger B. Wood, Assistant United States District Attorney, to his successor, John C. Knox, (now a Federal judge), to Raymond B. Sarfaty, Mr. Wood's assistant who developed the Rintelen case, to former Police Commissioner Arthur Woods of New York, his deputy, Guy Scull, his police captain, Thomas J. Tunney, and to the men who worked obscurely and tirelessly with them to avert disasters whose fiendish intention shook the faith if not the courage of a nation. Those men found Germany out in time. [Illustration: Inspector Thomas J. Tunney of the New York Police Department, head of the "Bomb Squad" and foremost in apprehending many important German agents] Germany was fluent in her denials. When the President in his message to Congress in December, 1915, bitterly attacked Germans and German-Americans for their activities in America, accusing the latter of treason, the German government authorized a statement to the Berlin correspondent of the New York _Sun_ on December 19, 1915, to the effect that it