Legio XV Apollinaris ("Apollo's Fifteenth Legion") was a legion of the Imperial Roman army. It was recruited by Octavian in 41/40 BC. The emblem of this legion was probably a picture of Apollo, or of one of his holy animals.
XV Apollinaris is sometimes confused with two other legions with the same number: An earlier unit which was commanded by Julius Caesar and met its end in North Africa in 49 BC, and a later unit that was present at the Battle of Philippi on the side of the Second Triumvirate and then sent east.
History Octavianus (later Emperor Augustus) raised XV Apollinaris in order to end the occupation of Sicily by Sextus Pompeius, who was threatening Rome's grain supply. After the Battle of Actium, where the legion probably gained its epitaph Apollinaris, it was sent to garrison Illyricum, where it probably remained until 6 BC, though it might have seen action in the Cantabrian Wars.
In AD 6, Apollinaris was part of the huge campaign by Tiberius against the Marcomanni that was obstructed by a revolt in Pannonia. Apollinaris saw a good deal of fighting in the suppression of the revolt. According to the historian Balduin Saria, this legion erected a camp on the site of the Colonia Iulia Aemona, which was established as a camp in 14 or 15, after the legion left for Carnuntum. This hypothesis has been rejected by the researcher Marjeta Šašel Kos as unfounded. By the year 9 the legion was headquartered in Pannonia, in the town of Carnuntum.
There the unit stayed until sent to Syria and possibly Armenia by Nero in 61 or 62, these territories newly conquered from the Parthians. After the conclusion of the war with Parthia, the legion was sent to Alexandria but soon found itself engaged in the fierce fighting of the First Jewish Revolt, capturing the towns of Jotapata and Gamla. It was the Fifteenth that captured the Jewish general later to become famous as the historian Josephus. During this period the legion was commanded by Titus, who would later become Emperor.
After the suppression of the revolt, the legion returned to Carnuntum and rebuilt its fortress. Elements of the XVth fought in the Dacian Wars although the main body of the legion remained in Pannonia.
In 115, war with Parthia broke out again and the legion was sent to the front, reinforced with elements of the XXX Ulpia Victrix. The legion fought in Mesopotamia, which was conquered by the Romans. After the conflict was over the unit stayed in the east with a new headquarters at Satala in northeastern Cappadocia, with elements stationed at Trapezus on the Black Sea and at Ancyra, modern-day Ankara. From this base the XVth helped repulse an invasion of Alans in 134.
By 162, Rome and Parthia were at war once more; the campaign, led by Emperor Lucius Verus was successful, and the legion occupied the Armenian capital Artaxata. In 175, the general Avidius Cassius rebelled against Emperor Marcus Aurelius, but the Fifteenth remained loyal and earned the additional title Pia Fidelis.
The history of the legion after this point involves more conjecture. As a unit stationed in the Middle East, it is almost certain to have taken part in later campaigns against Parthia, including the sack of its capital Ctesiphon by the Romans in 197, and in wars against the new Sassanid power that arose in Persia thereafter, though there is no direct record of this. At the beginning of the 5th century, the legion reappears in history: it is still quartered at Satala and Ancyra, though having lost its post at Trapezus somewhere along the way, and is under the command of the Dux Armeniae.
An inscription possibly relating to this legion was found in a cave in eastern Uzbekistan, perhaps carved by soldiers captured by the Parthians and dispatched to their eastern frontier as border guards.
Attested members Name Rank Time frame Province Source Marcus Julius RomulusEverett L. Wheeler, "Legio XV Apollinaris: From Carnuntum to Satala—and beyond", in Y. Le Bohec and C. Wolff, eds. Les Légions de Rome sous le Haut-Empire (Lyon/Paris 2002), p. 274 legatus legionis c. AD 49 Quintus Julius Cordinus Gaius Rutilius Gallicus legatus legionis 52–54 Aulus Marius CelsusWheeler, "Legio XV Apollinaris", p. 275 legatus legionis c. 63 Tacitus, Annales XV.25 Titus Flavius Vespasianus legatus legionis 67–68 Marcus Tittius Frugi legatus legionis c. 69 Josephus, Bellum Judaicum, VI.237 Sextus Sentius CaecilianusWheeler, "Legio XV Apollinaris", p. 278 legatus legionis c. 71 Quintus Egnatius CatusWheeler, "Legio XV Apollinaris", p. 279 legatus legionis c. 73Marcus Ulpius DasiusMommsen, "Inscriptiones Asiae Provincianum Europae, Graecarum, Illyrici Latinae 1873"Optioc. 80-138CIL III 4491 Gaius Minicius FundanusWheeler, "Legio XV Apollinaris", pp. 279f legatus legionis c. 90s ILJug-03, 1627 Marcus Vettius ValensWheeler, "Legio XV Apollinaris", p. 296 n. 217 legatus legionis c. 137 Rutilius Pudens CrispinusWheeler, "Legio XV Apollinaris", p. 305 legatus legionis 223–225 Manius Acilius Glabrio Gnaeus Cornelius SeverusGéza Alföldy, Konsulat und Senatorenstand unter den Antoninen (Bonn: Habelt Verlag, 1977), p. 210 tribunus laticlavius c. 140 Marcus Messius RusticianusWheeler, "Legio XV Apollinaris", pp. 297, 305 tribunus laticlavius c. 137–140 , Aulus Julius Pompilius Piso tribunus laticlavius c. 163 = ILS 1111 Lucius Gavius FrontoWheeler, "Legio XV Apollinaris", pp. 293f praefectus castrorum c. 117
Epigraphic inscriptions - Lucius Caecilius Luci filius / Papiria (tribu) Optatus / centurio legionis VII Geminae Felicis et centurio legionis XV Apollinaris (...). Barcelona (Barcino), Spain. . - Q(uintus) Atilius / Sp(uri) f(ilius) Vot(uria) Pri/mus interprex / leg(ionis) XV idem |(centurio) / negotiator an(norum) / LXXX / h(ic) s(itus) e(st) / Q(uintus) Atilius Cocta/tus Atilia Q(uinti) l(iberta) Fau/sta Privatus et / Martialis hered(es) / l(iberti?) p(osuerunt). Boldog, Slovakia. AE 1978 00635.
See also List of Roman legions Roman soldiers in the East Notitia Dignitatum, the document stating XV Apollinaris, 5th century
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