In the autumn of 1917, American warships sailed to the Argentine capital Buenos Aires and a delegation issued threats to the country's President Hipólito Yrigoyen, in relation to the country's neutrality, which the United States insisted should be more clearly focused as being pro-American.
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Yrigoyen refused to be bowed by such threats from a military delegation, whereupon the American ships sailed to Montevideo, where they were warmly welcomed by Brum, in contrast to the guarded reception which the delegation had received in Buenos Aires.
Congress rejected Yrigoyen's policy of neutrality, and approved a series of measures in support of the Allied Powers; indeed, the only significant presidential bill supported by Congress during the 1916-18 term was a modest, 5 percent export tariff enacted to finance needed rural public works.
Also, it is relevant the work of new Peruvian poets as Jose Pancorvo, Jorge Eslava, Rossella di Paolo, Domingo de Ramos, Rocio Silva Santisteban, Odi González, Ana Varela, Rodrigo Quijano, Jorge Frisancho, Mariela Dreyfus, Gonzalo Portals, Rafael Espinosa, Lorenzo Helguero, José Carlos Yrigoyen, Montserrat Álvarez, Ana María García, Alberto Valdivia Baselli, Grecia Cáceres, Xavier Echarri, among others.