One of the Houses of the Agrippa Sector, Houses Dukas is at the forefront of the gray area of trade with the Tau and Eldar. As a result its citzens enjoy one of the highest standards of living in the Imperium.

The house had a long association with the Victrix Astartes, but after their suppression in the Harrowing of Trajanus, the relationship transferred almost automatically to the Twelvers.

Among the many ways this has taken shape has been the granting of the world of Hraxis, and in particular its moon Ignatius, to the Twelvers. In addition, the heir to the house, Constantine Dukas has been inducted into the chapter cult, and serves in the chapter's fifth company.