Legio III Gallica Roman Vexillum

Legio III Gallica was created by Gaius Julius Caesar in 49–48 BC for the civil war against Pompey, enlisting veterans from the Cisalpine and Transalpine Gallic provinces.

It fought in all the major Caesarian campaigns, distinguishing itself at Dyrrhachium, Pharsalus, and Munda. After Caesar's assassination, it came under Mark Antony, with whom it participated in the Parthian campaign of 36 BC, the only legion explicitly mentioned by Plutarch. After Actium (31 BC), it was integrated into Augustus' army and sent to Syria, where its emblem, the bull, became familiar along the eastern limes.

In the 1st century AD, it was prominent in Corbulo's Armenian wars against the Parthians and was subsequently transferred to Moesia on the Danube. In 69 AD, the year of the four emperors, the III Gallica supported Vespasian and decisively contributed to the second Battle of Bedriacum, noting the characteristic sunrise salute of its legionaries. In the 3rd century, stationed in Emesa, it proclaimed Elagabalus emperor, but shortly after also participated in the revolt of Verus, which led to its temporary disbandment. Reconstituted by Alexander Severus and again sent to Syria, it is still attested in the 4th century with detachments in Egypt, testifying to a very long operational history in the service of Rome.