In early July 1769 the Confederate troops under the command of Casimir Pulaski, his brother Franciszek and Józef Bierzyński entered the Grand Duchy of Lithuania.
Following this new reforms and laws came into effect that greatly angered the Russian-Saxon faction.
Bierzyński quickly seized the majority of Radziwiłł's troops and militia.
As soon as the news reached Radziwiłł, he secretly left Biała for East Prussia and arrived on July 20.
On July 22, he demanded asylum from Frederick II the Great.
His officials in Poland announced that he was going to stay in Saxony with his old stepmother.
Frederick II indeed granted him asylum, but was determined to ally Karol Stanisław with Austrian supporters of the Bar Confederation in Silesia.
On July 31 he wrote a letter about it to A. Krasiński, T. Wessel and J. Mniszech.
Bishop Krasiński, a close supporter of Radziwiłł, was responsible for negotiating peace between the Russian court and the Confederates, however, he was not very successful.

Through Prague Radziwiłł came in the last days of August to Cieszyn, where he met with A. Krasiński and discussed political matters.
On September 7 he left for Presov in order to later settle (from November 1769) in the nearby town of Sebeș.
In early July 1769 the Confederate troops under the command of Casimir Pulaski, his brother Franciszek and Józef Bierzyński entered the Grand Duchy of Lithuania. Following this new reforms and laws came into effect that greatly angered the Russian-Saxon faction. Bierzyński quickly seized the majority of Radziwiłł's troops and militia. As soon as the news reached Radziwiłł, he secretly left Biała for East Prussia and arrived on July 20. On July 22, he demanded asylum from Frederick II the Great. His officials in Poland announced that he was going to stay in Saxony with his old stepmother. Frederick II indeed granted him asylum, but was determined to ally Karol Stanisław with Austrian supporters of the Bar Confederation in Silesia. On July 31 he wrote a letter about it to A. Krasiński, T. Wessel and J. Mniszech. Bishop Krasiński, a close supporter of Radziwiłł, was responsible for negotiating peace between the Russian court and the Confederates, however, he was not very successful.
Through Prague Radziwiłł came in the last days of August to Cieszyn, where he met with A. Krasiński and discussed political matters. On September 7 he left for Presov in order to later settle (from November 1769) in the nearby town of Sebeș.
Karol Stanisław Radziwiłł (1734–1790)