Trajan's Dacian Wars

Trajan's Dacian Wars
Part of the Dacian Wars
Date 101–102 and 105–106 Location Ancient Dacia Result Roman victory Territorial changes Roman Empire annexes Dacia west of Siret river Iazyge client kingdom set up in Banat and Oltenia
Belligerents
Dacia Roxolani[1] Buri[2] Bastarnae[3]	Roman Empire Iazyges
Commanders and leaders
Decebalus	Trajan
Units involved
Dacian army	Legio I Minervia Legio X Gemina Legio XI Claudia Legio IV Macedonica Legio XIV Gemina Legio VI Ferrata Legio XII Fulminata Legio IV Scythica Legio X Fretensis Legio II Adiutrix Legio IV Flavia Felix Legio VII Claudia Legio I Italica Legio V Macedonica Legio XIII Gemina Legio I Adiutrix
Strength
200,000 Dacians[4] Germanic and Sarmatian allies	16 legions (between 150,000 and 175,000 infantry + auxiliary)[4]
Casualties and losses
Heavy 500,000 prisoners[5][6]	Unknown

Trajan's Dacian Wars (101–102, 105–106) were two military campaigns fought between the Roman Empire and Dacia during Emperor Trajan's rule. The conflicts were triggered by the constant Dacian threat on the Danubian province of Moesia and also by the increasing need for resources of the economy of the Empire.