Between October 16 and December 7, 1622, he led negotiations with the Swedes, which ended with the signing of a two-year truce.
In 1654, King John II Casimir appointed him a member of the war council to the Lithuanian hetmans for the strengthening of the fortresses of the eastern borderlands of Lithuania.
[1] He took part in the defense of the Smolensk fortress against the Moscow army, and protested the capitulation, ordered by Wilhelm Korff [pl], his brother.
Together with Janusz Radziwiłł, he signed the Kėdainiai Agreement of October 20, 1655, placing the Grand Duchy of Lithuania under the protection of Charles V Gustav, King of Sweden.
He was married with Gertruda von Rosen, and has two sons: Walter, ciwun of Troki, and Ernest Jan, a major general in the Crown army, and daughter Anna Katarzyna, married to Gebhard Müllenheim, Court Master of the Hunt of Władysław IV.