Germany tried to stir up a revolt in Mexico.
Germany tried to destroy American ammunition factories.
Germany blamed the United States for her food situation without explaining to the people that one of the reasons the pork supply was exhausted and there was no sugar was because Minister of the Interior Delbrueck ordered the farmers to feed sugar to the pigs and then to slaughter them in order to save the fodder.
Germany encouraged and financed German-Americans in their campaigns in the United States.
Germany paid American writers for anti-American contributions to German newspapers and for pro-German articles in the American press.
Germany prohibited American news associations from printing unbiased American news in Germany.
Germany discriminated against and blacklisted American firms doing business in Germany.
Germany prevented American correspondents from sending true despatches from Berlin during every submarine crisis.
Germany insulted American women, even the wives of American consular officials, when they crossed the German border.
Germany threatened the United States with a Russian-Japanese-German-Mexican alliance against England and the United States.