Timeline

Yeerk Rebellion

 * ??: The Yeerk rebel against the Andalites, and leave their homeworld, taking Andalite ships with them.
 * ??: The Yeerks disappear into Kelbrid space.
 * ??: The Yeerks enslave the Nahara, the Ongachic, the Mak, and the Sstram.
 * ??: The Yeerks discover the Hork-Bajir World.
 * ??: The Yeerks begin to enslave the Hork-Bajir.
 * ??: The Quantum Virus is released.
 * ??: Aldrea becomes a Hork-Bajir nothlit.
 * ??: Seerow Hamee is born.
 * ??: The Yeerks ally

Jamilan's Adventures

 * ??: Andalite first contact with Earth:  Warrior Jamilan intercepts a Skrit Na vessel.
 * Alloran-Semitur-Corrass is infested.
 * The Yeerks discover Earth.
 * Jamilan flees to Earth and starts a life with Amanda.
 * ??: The Ellimist forces Jamilan back into space, revealing to him his destiny.
 * ??: Jamilan and Amanda's daughter, Nichole, is born.
 * ??: Jamilan and Ethril's son, Calafir, is born.

Yeerk Discovery of Earth

 * ??: Edriss 562 explores Earth.
 * Edriss 562 infests the first human.
 * Edriss 562 begins the Sharing.

2018

 * June: The GalaxyTree appears in Earth space, and is destroyed by Yeerk forces.