In 327 BC, Alexander the Great confronts a rebel warlord in an impregnable mountain stronghold called Sogdian Rock. He dispatches 300 hand-picked warriors to scale the sheer rock face, at night, without being detected. It's a brutal test of climbing skill and raw courage. The warlord is Oxyartes of Bactria, whose daughter Roxana later marries Alexander the Great.

Batavians, an amphibious Roman unit, lead the invasion of ancient Britain in 43 AD in a desperate mission deep in enemy territory that may hand the emperor an unlikely victory.