Akdor 1154 is the Yeerk who led the uprising against the Andalites and was the individual responsible for creating the Andalite-Yeerk War. The founder of the Yeerk Empire, Akdor spearheaded the Yeerk invasion across the universe.
"Two Gedds stood nearby. I knew that one was Janath 429, a very old Yeerk, and very wise. The other was Akdor 1154. It was Akdor who had led the uprising against the Andalites. It was Akdor who had first understood the concept of using a host body to act as a predator. It was Akdor who had personally killed four of the Andalite scum."
During the 1960s, Seerow, an Andaliteprince, visited the Yeerk homeworld and discovered that the Yeerks were intelligent, sentient species. Believing that the Yeerks deserved to travel the stars like the Andalites, Seerow built them a portable Kandrona and taught them writing, mathematics, science, engineering and astronomy, among other things. Armed with this newfound knowledge, Akdor was the first Yeerk to first understand the concept that they could use their Gedd host bodies to act as predators and use Andalite technology to escape the homeworld. In 1966, leading a troop of four hundred Gedd-Controllers, Akdor stole the Andalite Shredders and killed the Andalites guards, who were unable to defend themselves due to Seerow's explicit instructions that no Yeerk or Gedd be harmed. Upon killing the four Andalites guarding the two transport ships, Akdor stole the ships, loading a quarter million Yeerks from one the pools on the homeworld, and flew off, escaping Andalite pursuit by jumping into Z-space. Akdor's actions led to the foundation of Seerow's Kindness and ignited the Andalite-Yeerk War.
Creating the Yeerk Empire
"I was there. Do you understand what this moment was, what it meant? I was there when Akdor announced the birth of the Yeerk Empire."
In 1968, the space-faring Yeerks, led by Akdor, landed on Sector 5, RG-21578-4, the homeworld of the Hork-Bajir. After kidnapping three species, one of whom Akdor issued to Esplin 9466, Akdor asked Esplin whether the Hork-Bajir would be suitable as shock troops to use against the Andalites. When Esplin affirmed his belief, Akdor officially announced the birth of the Yeerk Empire, establishing a base of operations on the planet and arranging for hundreds of Hork-Bajir to be kidnapped and made into hosts.
A short while later, the Yeerks intercepted a broadcast by Seerow, who resided on the planet with his family as well. Akdor arranged for Esplin and Carger 7901, in Hork-Bajir bodies, to use the stolen Andalite fighters and eliminate Seerow, his wife, and his two children, Aldrea and Barafin. Due to Carger's impatience, Aldrea was spared, and Akdor, now in possession of a Hork-Bajir host himself, offered to promote Esplin to Sub-Visser if he succeeded in killing Aldrea.
"I had not kept my promise to Akdor. But that no longer mattered. The great Akdor had been killed by a Hork-Bajir firing one of our own Dracon beams."