Together with his cousin Janusz Radziwiłł in 1654 during The Deluge, or Swedish invasion of Poland, Bogusław Radziwiłł began negotiations with King Charles X Gustav of Sweden aimed at breaking the Commonwealth and the Polish–Lithuanian union.
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Pontus De la Gardie's second son, Jacob De la Gardie, was given the title count of Läckö in 1615 and his son Magnus Gabriel De la Gardie became favourite of Queen Kristina and married her cousin, Countess Palatine Maria Eufrosyne of Zweibrücken (sister to Charles X Gustav of Sweden).
During "the Deluge", when the Swedish armies invaded Polish–Lithuanian Commonwealth, which was already struggling with Muscovy, the Voivode of Poznań, Krzysztof Opaliński, surrendered Greater Poland to Swedish king Charles Gustav.
After king Charles X Gustav of Sweden together with Brandenburg had defeated the Polish army near Warsaw in 1656, its troops passed Missunde, where they made large destruction.