The Stockwood Scrolls
The Bloodied Thousand is the name of a mercenary troop owing their allegiance to the leaders of the Zhentarim. Their commander is Rian Nightshade, a tiefling warlock. The Bloodied Thousand are most famous recently for their participation in the Battle of Secomber – where they fought well but were defeated by the Cult of the Dragon when an ancient blue dragon came to their aid.
The name “Bloodied Thousand” is not actually a reference to the exact amount of troops in the troop, although it is said to be around that number.