Question: Who was king of Sweden during the Battle of Kirchholm?

Related documents: [0]  [DOC] The Battle of Kircholm (27 September 1605, or 17 September in the Old Style calendar then in use in Protestant countries) was one of the major battles in the Polish–Swedish War. The battle was decided in 20 minutes by the devastating charge of Polish cavalry, the Winged Hussars. The battle ended in the decisive victory of the Polish-Lithuanian forces, and is remembered as one of the greatest triumphs of Commonwealth cavalry. [END] 
[1]  [DOC] The Polish–Swedish War (1600–11) was a continuation of struggle between Sweden and Poland over control of Livonia and Estonia, as well as the dispute over the Swedish throne between Charles IX of Sweden and Sigismund III of Poland. [END]  
Answer: Charles IX
Charles IX