Siege of Åbo (1563)

Siege of Åbo
Part of the conflicts between Eric XIV and John III
DateSummer 1563 – August 12, 1563
Location
Åbo (modern day Turku), Finland
Result Victory for Eric XIV
Territorial
changes
Åbo is captured by the royal army
Belligerents
Forces under Eric XIV Forces under John III
Commanders and leaders
Eric XIV
Klaus Fleming
Henrik Klasson Horn
John III (POW)
Catherine Jagiellon (POW)
Klas Andersson 
Units involved
Unknown Åbo garrison
Strength
Several thousand 1,200 in the beginning
350 in the end
Casualties and losses
Unknown 850 killed or deserted

The siege of Åbo (1563) was a siege of Åbo by the royal army under Eric XIV against his brother, John III, in 1563.