As another war with Russia loomed, Sigismund Augustus pressed the members of parliament (Sejm) for the union, gradually gaining more followers due to his persuasive abilities and auspicious diplomacy. The potential union agreement would lead to the eviction of Lithuanian landowners who opposed the transition of territory from multi-ethnic Lithuania to Poland. Such terms were causing an outrage among the most renowned members of Lithuanian upper classes, but Sigismund was decisive and ruthless in this matter. Moreover, the personal union between the two countries created by the marriage of Jadwiga with Jogaila in 1385 was not entirely constitutional. Being the last male member of the Jagiellons, childless Sigismund sought to preserve his dynasty's legacy. The newly proposed constitutional union would create one large Commonwealth state, with one elected monarch who would simultaneously reign over both domains.