While England thus failed to rescue Spain from the aggression of Napoleon, she was suddenly brought face to face with the result of her own aggression in America. The repeal of the Non-Intercourse Act in 1810 had in effect been a triumph for Britain: but the triumph forced Napoleon's hand. As yet all he had done by his attack on neutral rights had been to drive the United States practically to join England against him. To revenge himself by war with them would only play England's game yet more; and with characteristic rapidity Napoleon passed from hostility to friendship. He seized on the offer with which America had closed her efforts against the two combatants, and after promising to revoke his Berlin and Milan Decrees he called on America to redeem her pledge. In February 1811, therefore, the United States announced that all intercourse with Great Britain and her dependencies was at an end. The effect of this step was seen in a reduction of English exports during this year by a third of their whole amount. It was in vain that Britain pleaded that the Emperor's promises remained unfulfilled, that neither of the decrees was withdrawn, that Napoleon had failed to return the American merchandise seized under them, and that the enforcement of non-intercourse with England was thus an unjust act, and an act of hostility. The pressure of the American policy, as well as news of the warlike temper which had at last grown up in the United States, made submission inevitable; for the industrial state of England was now so critical that to expose it to fresh shocks was to court the very ruin which Napoleon had planned. [Sidenote: State of England.]