Once Eric XIV of Sweden became king in September 1560 he took quick actions to get involved in the war. He negotiated a continued peace with Muscovy and spoke to the burghers of Reval city. He offered them goods to submit to him as well as threatening them. By 6 June 1561 they submitted to him contrary to the persuasions of Kettler to the burghers. King Eric's brother and future King Johan married the Polish princess Catherine Jagiellon in 1562. Wanting to obtain his own land in Livonia, he loaned Poland money and then claimed the castles they had pawned as his own instead of using them to pressure Poland. After Johan returned to Finland, Erik XIV forbade him to deal with any foreign countries without his consent.