Is this small passage worded and structured properly?

The companions understood that the signing of the Treaty of Garumn’s Gorge in 1372 DR had been a mistake and that the goblinkin races like orcs were inherently evil and always needed to be combated. Bruenor was determined to rally the peoples of the Silver Marches against the orcs of Many-Arrows, and his four friends agreed to assist him. However, the group decided that before they would journey to Mithral Hall, the dwarven stronghold that Bruenor had formerly ruled, they would make their way to Gauntlgrym to find their old comrade Thibbledorf Pwent, a dwarf battlerager who had been transformed into a vampire.