Taticius was a Byzantine general during the reign of Alexius I Comnenus. His name is also rendered as Tatikios, Tatizius, Tatitius, Tatic, or Tetig.

His father an Arab who was captured by Alexius' father John Comnenus and served as a slave in the imperial household. Taticius and Alexius grew up together, and he is described as an oikogenes of Alexius (that is, "from the same house").

In 1078, before Alexius was emperor, he accompanied Alexius in battle against his rival Basilacius, and discovered Basilacius' plans for an ambush. When Alexius became emperor in 1081 he held the office of Grand Primicerius in the imperial household. Later that year he commanded the Turkish (or possibly Pecheneg) mercenaries from Ohrid at the Battle of Dyrrhachium against Robert Guiscard.

In 1086 he was sent to Nicaea in an attempt to recapture it from the Seljuks; he was forced to retreat when he learned that Seljuk reinforcements were on their way. Alexius sent him back with naval assistance from Manuel Boutoumites, but although he was able to defeat Abul-Kasim, the governor of the city, in Bithynia, but could not recapture the city. At the end of the year he was recalled and sent to fight the Pechenegs, who were assisting the heretical Manichaeans revolt against Alexius, near Philippopolis. In 1087 he commanded the Byzantine right wing in the Battle of Drista against the Pechenegs, and in 1090 he defeated a small force of 300 Pechenegs while leading the Archontopouloi tagma against them.

In early 1094, he was placed in charge of guarding Alexius' tent at Pentegostis. Here he discovered the plot of Nicephorus Diogenes, son of the former emperor Romanus IV Diogenes, to kill the emperor. Nicephorus was an old friend of Alexius and Taticius and Alexius was reluctant to punish him, but it was clear that Nicephorus was ambitious for the throne. He was exiled and was eventually blinded. Later in 1094, he attended the synod of Blachernae which condemned Bishop Leo of Chalcedon, presumably in some function of security.

In 1095 Taticius accompanied Alexius in the campaign against the Cumans. In 1096 he defended Constantinople from reckless crusaders who attacked the city after their arrival. In 1097, with Tzitas and 2000 peltasts, Alexius sent him to Nicaea to assist the crusaders in their siege of the city. Crusade chronicler Albert of Aix says that he acted as an envoy between the Turks and the crusaders, but according to the more reliable Anna Comnena, he was working with Boutoumites to negotiate the surrender of the city without the crusaders' knowledge. This caused a deep rift between the Latins and Greeks.

However, Taticius was ordered to accompany the crusaders across Anatolia, both as a guide and also to ensure that any captured territory was retured to the Empire. After leaving Nicaea the crusaders split into two groups. Taticius accompanied the Norman (under Guiscard's son Bohemund of Taranto, Bohemund's nephew Tancred, and Robert of Normandy) and Flemish (under Robert of Flanders) contingents. The Gesta Francorum records that he frequently warned the crusaders of the ferocity of the Turks.

During the siege of Antioch, Raymond of Aguilers writes that he advised the crusaders to disperse and capture the surrounding countryside before attacking the city itself, which would also help them avoid a famine (this advice was ignored). In February of 1098 he left the siege; according to Anna, who probably talked to Taticius personally or had access to his reports, Taticius was informed by Bohemund that the other crusaders mistrusted him and had threatened his life. Bohemund, on the other hand, spread the rumour that Taticius was a coward and a traitor, and had fled the army never intending to return, despite his promises to bring back reinforcements from Constantinople. This is the account preserved in contemporary crusader chronicles, who refer to him as a great enemy and a liar (periurio manet et manebit, according to the Gesta Francorum); Anna's account, of course, may be influenced by her deep prejudice against Bohemund, a long-standing enemy of her father.

In April of 1099 Taticius and the Norman mercenary Landulf were made admirals and placed in charge of a fleet sent from Constantinople to confront a Pisan fleet on its way to assist the crusaders, which had been pillaging the coasts of the Empire. This fleet, equipped with Greek fire, ended up roaming off the coast of Cilicia and Syria, and came into conflict with the Pisans and later the Genoese in the following years.

The crusade chroniclers mention that Taticius had a mutilated nose; mutilation of the face was a common Byzantine punishment for traitors but this does not appear to be the case in this instance. According to Guibert of Nogent he had a prosthetic gold nose as a replacement. Contrary to the crusaders' opinions of him, Anna describes him as "a valiant fighter, a man who kept his head under combat conditions," and "a clever orator and a powerful man of action." Anna also tells the story that Taticius and Alexius were playing polo when the general was thrown from his horse and landed on the emperor. Alexius injured his knee in the incident and was thereafter afflicted by gout. Anna does not mention the date of this incident; it is an aside in her account of Alexius' campaigns against the Turks around 1110.

There is no record of the dates of Taticius' birth or death. Although the office of Grand Primicerius was usually held by a eunuch, Taticius seems to have had descendants who were members of a powerful noble family in the 12th century, including another general under Manuel I Comnenus.

References

• Steven Runciman, A History of the Crusades. Cambridge, 1952.
• Basile Skoulatos, Les Personnages Byzantins de L'Alexiade: Analyse Prosopographique et Synthèse. Leuven, 1980.
• Albert of Aix, Historia Hierosolymitana.
• Anna Comnena, The Alexiad, trans. E.R.A. Sewter. Penguin, 1969.
• Gesta Francorum et aliorum Hierosolimitanorum (anonymous)
• Guibert of Nogent, Gesta Dei per Francos.
• Peter Tudebode, Historia de Hierosolymitano itinere.
• Raymond of Aguilers, Historia Francorum qui ceperunt Iherusalem.