Complex sentence: He fought later against Gustavus Adolphus (1626--1629) (part of the Polish-Swedish War), and under Władysław IV in the Smolensk War against Muscovy in 1632--1634.
Split into simpler sentences: He fought later against Gustavus Adolphus (1626--1629) (part of the Polish-Swedish War). Few years later he fought under Władysław IV in the Smolensk War against Muscovy in 1632--1634.