Total War: Rome 2 has added a new playable faction that doubles as an ancient history lesson. The free update, available today, adds Baktria to the line-up, blending units from Greek and Eastern cultures.

The official site serves up a primer of Baktria, a protectorate that was part of Alexander the Great's empire. It served as a hub of Persia and Greek states, making it a unique blend of societies. You can read up to gain a deeper understanding of Baktria's rich history, and then use the power of modern technology to simulate them stabbing people in the neck. Video games!