 Napoleon, from whom Frederick Augustus was not able to keep the diplomatic maneuvers concealed, summoned the King urgently to Saxony after he had defeated the Prussian-Russian troops at Lützen on 2 May.Frederick Augustus decided to comply with the ultimatum presented to him.With no prospect of concrete assistance from Austria, and in view of the defeat of the Prussian – Russian coalition, which now sent peace signals to France, he felt he had no choice.