The Colonization Fleet was a civilian fleet of the Race dispatched from Home to establish a permanent presence on Tosev 3 following the expected easy conquest of that planet by the Conquest Fleet. On its arrival, however, the fleet, commanded by Fleetlord Reffet, found a situation very different from what it had expected. The colonists (who included the first females of the Race to live on the planet) found it very difficult to adapt to these circumstances, which included military threats from sovereign Tosevite not-empires as well as economic competition from the same mentioned species; frequent revolts by Tosevites living within the Race's territory; and the many social disruptions associated with ginger, the use of which quickly became widespread among the colonists.
As soon as they arrived, twelve starships were destroyed by a nuclear attack by an unknown Tosevite power. This power was eventually identified as the United States, which was forced to accept the destruction of Indianapolis as punishment.
Two other Colonization Fleets had been dispatched at earlier points in the Race's history, to Rabotev 2 and Halless 1 after each of those planets' conquests. Both were somewhat more successful than the Tosev 3 fleet.
It was said to have transported "eighty to one hundred million" Race settlers from Home to the Race's territory on Tosev 3.