06-14-2006, 10:02 PM
The prediction is that a lunar eclipse of special type indicated a successful invasion from the west, the overthrow of the lawful king, and continued success for the invader for eight years. A lunar eclipse of that type took place on 20 September 331, and functioned as a self-fulfilling prophecy; discouraged soldiers in Darius' army fled. The eight years were over in 323, for which solar eclipse (indeed, symbol of Macedonia) was predicted. For the details, see the online accounts of the battle of Gaugamela and Alexander's final days.