 Complete the following phrase:  The Achilleis after the Ancient Greek , Achillēis,  is a lost trilogy by the Athenian dramatist Aeschylus. The three plays that make up the Achilleis exist today only in fragments, but aspects of their overall content can be reconstructed with reasonable certainty. Like the Oresteia which forms a narratively connected unit with a continuous plot, the trilogy had a unified focus, presumably treating the story of Achilles at 