In 1356, Algird took the region of
Bryansk, which included
Trubetsk and
Starodub, from the
Principality of Smolensk and granted it to his son Dmitry to govern. The territory was in the far northeast from the heartlands of the
Grand Duchy of Lithuania and bordered the
Principality of Moscow. In 1370,
Dmitry Donskoy, the grand prince of Moscow, unsuccessfully attempted to conquer the territory. In 1372, Dmitry witnessed the
Treaty of Lyubutsk between Algird and Dmitry Donskoi. Dmitry took a more passive role in the coalition: he did not wage a direct war against Lithuania and did not defend his domain when it was attacked by Moscow's army in 1379. Dmitry and his family followed the retreating Russian army into
Moscow where Dmitry Donskoi granted him
Pereslavl-Zalessky. In 1380, Dmitry led a Russian banner in the
Battle of Kulikovo against the
Golden Horde. Russian chronicles praise his and his brother's tactical skills. After 1380, Dmitry is mentioned in written sources only twice. After his brother Andrei was captured by
Skirgaila's forces and imprisoned in Poland, Dmitry reconciled with Jogaila, now King of Poland, in 1388. He returned to his former domain in Bryansk. Dmitry died in 1399 in the
Battle of the Vorskla River against the
Golden Horde. Dmitry's son
Michał Trubetsky is considered to be the ancestor of the
Trubetskoy family. ==References==