At the stormy Assembly of the Estates in 1789, were Gustav III needed the support to continue the ongoing Russo-Swedish war, the monarch came into open conflict with the nobility, which was in opposition to the war and the Union and Security Act: he used the other estates to defeat the nobility and had many representatives of the nobility placed in house arrest and imprisoned. This caused a break between Gustav III and the nobility, and it was demonstrated by a social boycott of him led by the female members of the aristocracy: the noblewomen made a political demonstration of their opinions by turning down all private invitations and socializing with him in his capacity of a private person: they demonstrated by visiting the Princesses, Hedwig Elizabeth Charlotte of Holstein-Gottorp and Sophie Albertine of Sweden, who were also known to be in opposition to Gustav III, while at the same time turning down his invitations. Jeanna von Lantingshausen was the leader of this political demonstration of female nobles, and is reported to have been the instigator of it.