Also known as Beagle or Butchers.

The Empire sent a variety of knightly orders to go and pacify the tribals, lead under the banner of the Children of the Phoenix, this didn't really end as the empire would hope as the expedition largely failed with the orders getting decimated or failing to gain any major headway. That and the tribes were far away and didn't really have anything worth taking. As a result, the remaining orders became isolated from the Empire over time, and some even broke away. The Blood Eagles is one of these breakaway orders that became tribes, and is the last remaining one. 

And the most brutal. The empire uses brutal tactics and the Blood Eagle adopted this, often using the flayed skins of their enemies as banners and leaving grisly corpses to warn others not to oppose them. Hence the nickname "butchers" that you often see. The Blood Eagle are also the most arrogant, viewing the tribes as nothing but a group of primitives. 

They value honor above all else, and being an oath-breaker is the worst thing you could do as a Blood Eagle. Despite their savagery in combat, they are an extremely organized force that is hampered by an extremely broken and byzantine bureaucracy, along with having trade connections to the empire. They also never surrender and aren't into the taking prisoners business.

Before Tribes: Ascend, they were the mortal enemies of the Star Wolves, with them being at war for **centuries** by the time of the first tribes game. Even though the Children of the Phoenix tries to mediate the conflict between the two, the Blood Eagles claim to the oldest tribe (which is impossible) causes some friction with them as well.