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Principia Moderni III
| United Norse Crown|| Prussia
|Commanders and leaders|
The Karelian War was a major military engagement between the states of Russia and the Holy Roman Empire, under Austria, and the United Norse Crown.
The war ended in 1457, with all parties agreeing to meet for a ceasefire. As a result, the Treaty of St. Patriksburg was created between all those involved in the war. It was signed in 1458.