André Geraque Kiffer 
Battle Of Marathon, September 12, 490 Bc [PDF ebook] 

In the simulation will be considered the historical operational strategy of Datis, which is to get an involvement on Athens, but preserving a tactical force in Marathon able to maintain the initiative, obtaining a tactical victory. This would be obtained either by the destruction of the Greek army on the spot, or by its retraction under pressure from the Persian cavalry to the enclosed gates of the city-state.