Tarentus

Tarentus is an arid Desert World, but at the same time an Agri World. It is located within Ultramar, in the Ultima Segmentum. It is ruled and protected by the Ultramarines. The planet is covered in huge domed centres, producing vast amounts of food that goes to supporting other planets and the Ultramarine legions. They also make use of as much moisture as they can get out of the parched planet, setting up large water traps.

Tarentus is part of a group of three agri-systems known as the 'Three Planets'. Just after the Battle of Macragge, a group of Ork scavengers arrived on the 'Three Planets' and proceeded to conquer them. Marneus Calgar led the Ultramarines to reconquer these planets for the good of Ultramar. The other two planets are Quintarn and Masali.