The Treaty of Garumn's Gorge was a treaty signed to ensure peace between an upcoming orc kingdom of the Silver Marches and others of the region.
In 1372 DR, both Bruenor Battlehammer and Obould Many-Arrows signed the treaty. It ended the fierce war between the newly recovered dwarven kingdom and the beginnings of the orc realm known as the Kingdom of Many-Arrows.
For the good of their respective peoples, they put their names to the Treaty of Garumn's Gorge, recognizing the Kingdom of Many-Arrows and forever changing the face of the Silver Marches
As of 1409 DR, the two kingdoms were still at peace, although Bruenor had expressed sincere regret on numerous occasions.