32-31 BC. and later, plated Marc Antony Denarius, cf. Crawford 544/38.

Marc Antony, for Legio XXII (Legio XXII Deiatoriana), Patras mint (?), 32-31 BC.,
silver plated Denarius (18-19 mm / 2,60 g),
Obv.: above: A[N]T AVG , below: III VIR R P [C] , praetorian galley right with scepter tied with fillet on prow.
Rev.: LEG - XXII , Aquila (legionary eagle) between two military standards.
cf. Crawf. 544/38 ; cf. BMC 217 ; cf. Sear 382 ; cf. Syd. 1245 ; cf. Bab. 137 ; cf. RSC 59 .

Most likely minted in Patrae, Marc Antony's winter headquarters.

Legio XXII Deiotariana was one of the 6 Roman legions with duplicate numbers. The name is derived from Deiotarus, a king who was allied with the Romans.
Deiotarus (c.105-40) was the leader of the Tolistobogii, a Celtic tribe living in what is now central Turkey. He was a loyal ally of Rome during the wars against Mithridates VI of Pontus. In 63/62, the Roman commander Pompey made him king of all Celts in Turkey, which are usually called Galatians. With the help of Roman advisers, he built a large army, which consisted, in 48 BCE, of 12,000 infantry and 2,000 cavalry. The Roman author Cicero suggests that they were divided into thirty cohorts, which is the equivalent of three legions.
After a defeat against king Pharnaces of Pontus, the survivors were regrouped into one legion, which was among the troops of Julius Caesar during the battle of Zela (2 August 47).
When Galatia was annexed by the emperor Augustus (25 BCE), these troops were integrated by governor Marcus Lollius in the Roman army. The unit was from now on called legion XXII Deiotariana. The number was chosen because the Augustean legions numbered to twenty-one (XXI Rapax), so the addition had to be twenty-two.
It was transferred to Alexandria in Egypt, where it stayed for more than a century. When this happened is not clear, but the first Egyptian evidence dates back to the year 8 BCE. Our unit shared its base near Alexandria with III Cyrenaica. Sometimes, these legions were used to suppress violence among the ethnic groups living in the city (Greeks, Egyptians, and Jews). In 63, a subunit took part in the Parthian expedition of Domitius Corbulo, and another subunit fought in the Jewish War of 66-70. The Jewish historian Flavius Josephus praises the courage of the soldiers of the Alexandrine legion. During the civil war of 69, XXII Deiotariana and III Cyrenaica sided with the pretender Vespasian, who became emperor.
The legion is attested for the last time in 119 (or perhaps 123), when it was still in Alexandria with III Cyrenaica, and was no longer in existence in 145, when a catalogue of legions was made. The unit was probably destroyed by the Jews during the revolt of Simon ben Kosiba (132-136).

Not to be confused with a similar legion under the command of Octavian, this Antonian legion was either disbanded or incorporated into another legion after Actium.
The loss of three legions near the end of Augustus' reign brought the army down to 25 legions. Only two of the subsequent Julio-Claudian emperors were to do anything about this, but by the end of Nero's reign in 68 A.D., the strength was back to 28 legions again.
A second, later Legio XXII Primigenia (devoted to goddess Fortuna) was a Roman legion levied by Roman Emperor Caligula in 39, for his campaigns in Germania. There are still records of the XXII Primigenia in Mogontiacum (modern Mainz) from the end of 3rd century. The legion's symbols were a Capricorn and the demigod Hercules.
XXII Primigenia was first stationed in Mogontiacum in the Roman province of Germania Superior, guarding the Rhine border as part of the limes. Along with the rest of the Germanic army, the legion supported Vitellius in the Year of the four emperors (69). During the Batavian rebellion, XXII Primigenia, commanded by Gaius Dillius Vocula, was the only Germanic legion that survived attacks of the rebels and stayed in its camp, defending Moguntiacum. They remained in Moguntiacum until at least the 3rd century. Later Emperor Hadrian was tribunus militum of the XXIIth in 97-98.
The Rhine settlement was their main camp, but vexillationes of the legion participated in the building of the Antonine wall in Scotland (2nd century) and in the campaigns against the Sassanid Empire (around 235).
They were still in Moguntiacum during the attack of the tribe of the Alamanni in 235, and were responsible for the lynching of emperor Alexander Severus, when he tried to negotiate with the enemy, and the subsequent election of Maximinus Thrax as new emperor.
In 268, Primigenia probably fought under Gallienus at the Battle of Naissus, winning a victory over the Goths. The following year, Laelianus, the commander of the 22nd, became emperor of the Gallic Empire.