was there a elite cavalry used by the romans?
Yes, the Imperial cavalry
Roman cavalry
When the Republic transitioned into the Empire, Augustus made a regular Auxilia corps of non-citizen soldiers.
what is the emesa helmet? A Roman cavalry helmet can you please describe it? It consists of an iron head piece and face mask, the latter of which is covered in a sheet of silver and presents the individualised portrait of a face, likely its owner. when was it discovered? August 1936 what is its function? The Emesa helmet is highly functional, and was likely made for both parades and battle. where was it discovered? The modern-day city of Homs is it on display anywhere? Yes, the National Museum of Damascus. has it been restored? Yes,  the Emesa helmet underwent several unsuccessful restorations, eventually it was taken to the British Museum, where a final restoration was finished what was the helmet made out of? Iron what other equipment did the cavalry you mentioned before use? A Corinthian helmet, mail armour, saddle how was the recruitment done? Large numbers of young men from the First Class of commoners were regularly volunteering for the service, which was considered more glamorous than the infantry. what was the unit size? Each Polybian legion contained a cavalry contingent of 300 horse, and the cavalry contingent was divided into 10 "turmae" of 30 men each what was the unit structure? The cavalry contingent was divided into 10 "turmae" of 30 men each and he squadron members would elect as their officers three "decuriones" , of whom the first to be chosen would act as the squadron's leader and the other two as his deputies. what was the unit structure? The cavalry contingent was divided into 10 "turmae" of 30 men each and the squadron members would elect as their officers three "decuriones", of whom the first to be chosen would act as the squadron's leader and the other two as his deputies. do you know which type of horses were used? UNANSWERABLE did the cavalry participate in any campaigns? Yes do you know which ones? Battle of Heraclea
wiki:20550579
Roman cavalry [SEP] Imperial cavalry (30 BC – 476 AD)
When the Republic transitioned into the Empire, Augustus made a regular Auxilia corps of non-citizen soldiers. These professional Roman soldiers, like the Legions, were subjects recruited from the non-citizens in provinces controlled by Rome that had strong native cavalry traditions. These men, unlike the Allied Foederetii cavalry, were a regular part of the Roman army and were paid and trained by the Roman State. Arrian describes them as well-equipped and performing well-executed maneuvers. A typical cavalrymen of the Ala would be paid 20 percent more than a typical citizen legionary. Roman Auxilia cavalry were usually heavily armored in mail and armed with a short lance, javelins, the Spatha long sword, and sometimes bows for specialist Horse archer units.