Dalek Empire (audio series)
From Tardis Wiki, the free Doctor Who reference
Dalek Empire is a series of linked audio dramas produced by Big Finish. Dalek Empire and Dalek Empire II: Dalek War detailed humanity's fight against the Daleks seen through two multiple individuals, in particular; Alby Brook, Susan Mendes and Kalendorf.
Dalek Empire III continued from the end of Dalek Empire II: Dalek War with a mostly new set of characters.
The Dalek Empire audio series also has some links to the Dalek Empire (Doctor Who) set of four audios (The Genocide Machine, The Mutant Phase, The Apocalypse Element and The Time of the Daleks).
See Also Big Finish - Explored Worlds for more detail