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In page Livonia:

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Johan III, due to his friendship with Poland-Lithuania, began a policy against Muscovy. He would try to obtain more land in Livonia and to dominate Denmark. After all parties had been financially drained, Frederick II let his ally, King Sigismund II Augustus of Polish–Lithuanian Commonwealth, know that he was ready for peace. On 15 December 1570, the Treaty of Stettin concluded the Northern Seven Years' War.[citation needed]