History /
Ancient Polish History thread [180]
Lithuania at that time was not Christian. He became a Grand Duke of Lithuania in 1377, but the transition was not smooth. There were others who claimed the title, mainly his brothers. But the biggest fight he faced was with his uncle Kiejstutem and his sons.
In 1381 he was deposed for a short while by his uncle but regain the control and imprisoned him and his son Witold. His uncle died shortly after that but his main rival Witold escaped to the territory held by Teutonic Knights still claiming the title.
Facing the danger of being deposed by Witold with the help of Teutonic Knights, the only recourse was some kind of a union with Poland. In 1385 that union was signed. It was stipulated that He the Grand Duke of Lithuania will marry a Polish queen Jadwiga (who was a Queen of Poland since 1384). In exchange Lithuania will become catholic and will be united with Poland, but Jagiełło will regain the lands that he have lost to the Crown (Pomorze held by Teutonic Knights). In 1386 there was a baptismal, his wedding to Jadwiga and coronation of Władysław Jagiełło as King of Poland.
In one single stroke he has consolidated his power, eliminated his rivals and became stronger than ever. In 1387 the Christianization of Lithuania has begin according to the agreement (his brother Skirgielle was supervising this process) and in 1392 it was Witold.
As a ruler of a pagan state he was in a constant danger of losing his domain to the Christian Kingdom and He knew it. At the end it’s just Politics as usual.