Battle of Tapae (First Dacian War)(101)
Background
As soon as Trajan became Roman emperor, he planned a campaign against Dacia. This campaign resulted in the first Dacian war fought between 101 and 102. The reason used for this campaign was Decebalus' lack of respect for the Romans, and the fact that he failed to respect the agreements of the peace reached following the Domitian's Wars from 87/88. Beside the nine Roman legions that were already stationed on the Danube frontier, Trajan brought two more, Legio X Gemina and Legio XI Claudia, and created two new legions, Legio II Traiana Fortis and Legio XXX Ulpia Victrix.
Campaign: First Dacian War (101–102 AD)
Forces Engaged

The Battle

The first major field battle of Trajan's campaign. The Dacians chose the strategic mountain pass at Tapae to negate the Roman numerical advantage. Roman discipline broke the Dacian line, but a storm was interpreted as a divine sign, causing the Dacians to withdraw before total destruction.
The First Battle of Tapae occurred in 101 AD during Emperor Trajan's initial campaign into Dacia. Roman forces engaged King Decebalus at the Transylvanian Iron Gates, securing a hard-fought tactical victory despite heavy casualties and difficult weather conditions.
Casualties & Outcome
Roman: ~5,000 killed and wounded. Dacian: ~8,000 killed and wounded. Figures approximate — ancient sources vary.
Roman Empire achieved victory over Dacia.
Because the winter was near, Trajan decided to wait until spring to continue his offensive on Sarmizegetusa. Decebalus took advantage of the new situation, and in the winter of 101 to 102, he attacked the Roman province of Moesia, a major clash taking place at the Battle of Adamclisi.
Historical Record








Significance & Legacy
The first great confrontation of the Dacian Wars. It forced Decebal into his mountain fortresses and established Roman military superiority on the open battlefield, though the Dacian army survived intact.
Frequently Asked Questions
- When was the Battle of Tapae (First Dacian War)?
- The Battle of Tapae (First Dacian War) took place in 101. September 101 AD.
- Who won the Battle of Tapae (First Dacian War)?
- The Roman Empire were victorious against the Dacia.
- What was the significance of the Battle of Tapae (First Dacian War)?
- The first great confrontation of the Dacian Wars. It forced Decebal into his mountain fortresses and established Roman military superiority on the open battlefield, though the Dacian army survived intact.