Are these sentences worded in the correct way?

Upon Bruenor and his companions return from the fateful battle, Drizzt gave Catti-brie the enchanted robes that had belonged to Jack, and she began to be tutored in the magical arts by Alustriel and Nanfoodle. Soon thereafter, in the great chamber in Mithral Hall known as Garumn’s Gorge, Bruenor and Obould signed a treaty that ended the fierce war between the two peoples and officially established the Kingdom of Many-Arrows.