Legio X Equestris in the context of "Legio X Gemina"

Legio X Gemina ("10th Twin(s) Legion" in English), was a Roman legion, which was active during the late Roman Republic and later the Roman Empire as part of the Imperial Roman army. It was one of the four legions used by Julius Caesar in 58 BC, during the Roman invasion of Gaul. After being briefly disbanded, the legion was reconstituted by Augustus (also known as Octavian) and fought on the side of the Second Triumvirate during the Liberators' Civil War and later on the side of Augustus during the War of Actium which ended the Crisis of the Roman Republic. The legion remained active for centuries, with surviving records of its continued existence in Vienna as late as the 5th century AD. The legion's symbol was a bull. Early on in its history, the legion was called X Equestris (mounted), because Caesar once used the legionaries as cavalry.