Mezue ahịrịokwu na-esonụ: Agbanyeghị, n'oge a, Duchy nke Courland nọgidere bụrụ ihe na-amasị ma Sweden ma Polish-Lithuanian Commonwealth. N'afọ 1655, ndị agha Sweden batara n'ókèala nke Duchy, na-amalite
Agha Sweden na Poland (1655-60) Ndị agha Sweden jidere Duke Jacob (1658<unk>60). N'oge a, ndị Dutch weghaara ógbè abụọ nke Courland bụ́ ndị na-enweghị ihe oriri na ndị ọrụ, ụgbọ mmiri ndị ahịa na ụlọ mmepụta ihe ndị dị na ha bibiri. Agha a biri na Nkwekọrịta Udo nke Oliwa (1660). Courland nwetaghachiri Tobago na ndabere nke nkwekọrịta ahụ ma jide ya ruo 1689. Duke Jacob malitere iweghachi ụgbọ mmiri na ụlọ ọrụ mmepụta ihe, mana Duchy nke Courland eruteghị ọkwa ọganihu ya tupu agha.