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800 BCE
700 BCE
600 BCE
500 BCE
400 BCE
300 BCE
200 BCE
100 BCE
0 CE
100 CE
750 BCE - 510 BCE: The semi-legendary celeres or trossuli - a 300-man cavalry corps which the first kings of Rome incorporated into the legion - is formed, later their number is increased to 600.
578 BCE - 535 BCE: Servius Tullius, the king of Rome, increases the number of the cavalry corps (equites) to 1,800.
400 BCE: The Roman cavalry is expanded to include riders who can pay for their own horse.
216 BCE: Hannibal wins the battle of Cannae, the worst defeat in Roman history.
100 BCE: Roman cavalry riders are by now classified as auxilia and organised in wings or alae.
58 BCE - 51 BCE: Julius Caesar's conquest of Gaul.
101 CE - 106 CE: Trajan conquers Dacia.