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In page Krzysztof Radziwiłł:
"He successfully fought in Polish Livonia against Sweden from 1600s to 1617. He took part in the campaign against the Swedes in the Baltic region in 1621–1622 (Polish-Swedish War), where he agreed to a controversial truce (as he had no permission to negotiate it from the king or the Sejm).[1] Important commander of Lithuanian forces during the Smolensk War, where he was instrumental in obtaining the capitulation of the Russian army in the relief of Smolensk.[1] Afterwards, in 1635, he retired from his military career, concentrating on administering his estates. A Calvinist, he was a great protector of Protestants in Lithuania.
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