The Battle of Tryszki, Tryškiai or Triski, on December 14, 1701, was a small engagement between Swedish forces under Charles XII of Sweden and Polish–Lithuanian forces under Grzegorz Antoni Ogiński, in the town of Tryszki (Tryškiai), Samogitia (present-day Lithuania). After the Crossing of the Düna Charles went into an alliance with the Sapieha family to gain his support in dethroning Augustus II the Strong from the Polish throne, in exchange for protection from rival families in Samogitia, such as the Ogiński family. After initial engagements between Swedish forces and those loyal to Grzegorz Antoni Ogiński, the Swedish king personally takes command of the troops and engages Grzegorz at the town of Tryszki; after a brief encounter, Grzegorz is forced on the run and, with Charles being hot on his heels, eventually retreats out of Samogitia altogether. A Swedish detachment is established at Wilno (Vilnius) in Lithuania, as a sort of forward operating base before the inevitable Swedish invasion of Poland (1701–1706); further engagements, foremost the Battle of Darsūniškis, confirms the Swedish invasion. Although only a small action in a major war, the battle quickly sparked false rumours to be spread around Europe; one spoke of the death of Charles, somewhere in Lithuania, while the other mentioned a major defeat for Grzegorz, involving many thousands of participants.