Claim: The Siege of Zamość, which was part of The Deluge, began on February 25, 1656 and the invaders withdrew on March 1.
Evidence: Siege of Zamość was part of The Deluge, a series of campaigns in the Polish–Lithuanian Commonwealth, that took place in early 1656. On February 25, 1656, Swedish troops appeared at the gates of the stronghold. Within a few days, Charles X Gustav realized that capturing Zamość, whose fortifications had been strengthened since 1648, was impossible, and on March 1, the invaders withdrew. 
Siege of Zamość was part of The Deluge, a series of campaigns in the Polish–Lithuanian Commonwealth, that took place in early 1656. February 25 – March 1, 1656