Roman Navy, Roman Empire,Helmet, Montefortino, Coolus, Gallic - imperial, Pre-Republican military evolution, Italic - imperial, The Imperial Army, Helmets, Roman centurion, Battle Order, Layer, Tunic,, Sandal, Armor, Dagger, Sword, Shield, Scutum, I shield with the symbols of the Praetorian Guard of the Emperor, Javelin Pilum, Banner of the Praetorian Guard, Banners of the Legions, Aignum, Aquilla and Vexillum, Aquila, Vexilla, Signum, Imago, Draco, Other banners, War Machines, artillery, Crossbow, Fixed crossbow, Scorpio, Heavy Crossbow, Mobile Crossbows, Onager and Onagri, Catapult, Fixed battering-ram, Car of Assault, Mobile Tower of Assault, Principal enemies of Rome: Carthaginians, Celts, Germans, Huns, Roman Gladiators, Origin of the Title Caesar, Publius Aelius Traianus Hadrianus, Gaius Julius Caesar, Scipio Africanus, Constantine I, The Great, Vespasiano, Tito Flavio Sabino Vespasiano, Cneo Pompeyo, el Magno, Trajano, Marcus Ulpius Nerva Traianus.