Duke Charles's victory at S:t Mårtens secured Swedish control over Finland during the war against the deposed King Sigismund.
Key Facts
- Date
- 29 August 1599
- Duke Charles's force
- 2,000–3,000 men
- Axel Kurck's force
- 1,100 men
- Finnish pursuit distance
- 1–2 leagues after initial retreat
- Notable Swedish casualty
- Hans Buck killed in combat
- Outcome
- Swedish victory under Duke Charles
By the Numbers
Location
Cause → Event → Consequence
Following his decisive victory at Stångebro in 1598, Duke Charles consolidated power in Sweden and launched a second expedition to Finland in August 1599 to suppress remaining support for the deposed King Sigismund. Axel Kurck commanded a Finnish force loyal to Sigismund but withdrew toward S:t Mårtens fearing encirclement after Charles landed at Ruskiakallio.
On 29 August 1599, Charles's force of 2,000–3,000 men engaged Kurck's 1,100 men near S:t Mårtens. The Finns initially repelled the Swedish vanguard, wounding its commander Kasten Schade and inflicting casualties, but were overwhelmed when the main Swedish force arrived. Finnish troops then attacked Hans Buck's detachment, killing Buck and his lieutenant Lukas Reuter, before pursuing the Swedes for one to two leagues.
Despite inflicting significant losses and initially pressing the Swedes, the Finnish force fell into disarray after becoming exposed at the rear and was ultimately defeated. The victory extended Charles's authority over Finland and further undermined Sigismund's capacity to reclaim the Swedish crown.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Duke Charles (later Charles IX), Kasten Schade, Hans Buck.
Side B
1 belligerent
Axel Kurck.