Algirdas

Type Figure Region Lithuania Time c. 1296–1377 Also known as Algirdas、Olgierd、Grand Duke Algirdas of Lithuania

Grand Duke of Lithuania (1345–1377), son of Gediminas, who ruled the east jointly with his brother Kęstutis, pressed the Golden Horde and controlled …

Timeline

c. 1316–1341Vilnius · LithuaniaRose gradually amid power struggles among his brothers, taking part in military actions against the Rus' principalities and the Polish frontier; by the early 1340s he effectively directed the Grand Duchy's eastern and southern expansion.
1345–1350Vilnius · LithuaniaSucceeded his brother Jaunutis as Grand Duke in 1345 and agreed with his brother Kęstutis to divide rule: Algirdas governed the east and advanced campaigns against the Golden Horde and Rus', while Kęstutis was responsible for defending the west against the Teutonic Order; in the mid-to-late 1340s he consolidated influence over Kiev and the Smolensk corridor.

Sources

Algirdas https://www.britannica.com/biography/Algirdas
Algirdas https://en.wikipedia.org/wiki/Algirdas