Battle of Tapae may refer to:
The Second Battle of Tapae (101) was the decisive battle of the first Dacian War, in which Roman Emperor Trajan defeated the Dacian King Decebalus's army. Other setbacks in the campaign delayed its completion until 102.
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 First Battle of Tapae 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.
The Roman army crossed the Danube at Viminacium, slowly making its way into Dacia. Just like in 87/88, the battle took place at Tapae. The Dacians resisted the Roman offensive, but as a storm broke out, the Dacians believing it is a sign from the gods, decided to withdraw.
Domitian's Dacian War was a conflict between the Roman Empire and the Dacian Kingdom, which had invaded the province of Moesia. The war occurred during the reign of the Roman emperor Domitian, in the years 86–88 AD.
At the end of 85 or the beginning of 86 AD, the Dacian king Duras ordered his troops to attack the Roman province of Moesia on the southern course of the Danube river. The Dacian army was led by Diurpaneus, often cited as one and the same with the later king titled [Decebalus], although these assumptions remain obscurely founded and problematic. It seems that Romans were caught by surprise, since the governor Oppius Sabinus and a legion, probably the V Alaudae, were annihilated.
Following this attack, the Roman emperor Domitian, accompanied by Cornelius Fuscus, Prefect of the Praetorian Guard, personally arrived in Moesia, reorganized the province into Moesia Inferior and Moesia Superior, and planned a future attack into Dacia. To replace the lost legion and greatly strengthen the Roman army at this section, the IIII Flavia from Dalmatia and two more legions, the I and II Adiutrix, from western provinces were moved to Moesia. The region of Sirmium was attached to Moesia Superior, in order to have a single command over the endangered Dacian frontier.
Tapae was a fortified settlement, guarding Sarmizegetusa, the main political centre of Dacia. Its location was on the Iron Gates of Transylvania, a natural passage breaking between Țarcului and Poiana Ruscă Mountains and connecting Banat to Țara Hațegului. This made it one of the very few points through which invaders could enter Transylvania from the south. Moreover, 8 kilometres down the passage into Țara Hațegului, there is Sarmizegetusa Regia.
Cassius Dio notes the existence of a military camp there during the Dacian Wars. The place is the site of two battles between Dacians and Romans.
Nowadays there is a small village on this site named Zeicani, located within Sarmizegetusa commune.