| People | Comment |
| Battle on the Allia 390 / 387 |
Date either 390 or 387. An army of invading Celts from the Po River plain, lead by Brennus, defeated a Roman army and occupied Rome; they only withdrew after the Romans had paid ransom. |
| Battle of Heraclea 280 |
First defeat inflicted on Romans by Pyrrhus, but not decisive. |
| Battle of Asculum 279 |
Second defeat inflicted on Romans by Pyrrhus, but not decisive. |
| Battle of Beneventum 275 |
Although Roman historiography claims a Roman victory over Pyrrhus in this battle, it is assumed that this battle also ended in a defeat of the Romans by Pyrrhus |
| Battle of Mylae 260 |
Naval victory of the Romans over the Carthaginians in the 1st Punic War. This came as a surprise, as Rome was a land power and Carthago hitherto enjoyed hegemony on the seas in the western Mediterranean. The Roman strategy of using 'bridges' to enable their soldiers to walk over to the enemies' ships was successful. |
| Battle of Tunis 255 |
A land battle in the 1st Punic War in which a Carthaginian army under the command of a Spartan routed a Roman army. |
| Battle of Aegates Islands 241 |
Final naval battle of the 1st Punic War; a Roman victory; Carthago, exhausted by 24 years of war, surrendered. |
| Battle at the Trebbia 218 |
Battle early in the 2nd Punic War. Hannibal's Numidian cavalry succeeded in routting the Roman cavalry and encircling the Roman infantry. However the Roman infantry succeeded in breaking through the line formed by Hannibal's infantry (Spaniards, Celts). Militarily a draw or a slight advantage for Hannibal, as he remained in possession of the battlefield. |
| Battle on Lake Trasimene 217 |
During the 2nd Punic War. A Roman army under consul Flaminius, in pursuit of Hannibal, was entrapped between the Lake Trasimene and the adjacent hills (where Hannibal's forces laid in hiding). The Roman army was annihilated. |
| Battle of Cannae 216 |
During the 2nd Punic War. A Roman force of 80,000 faced a Carthaginian force of 50,000 on the banks of the river Aufidus. Hannibal's Numidian cavalry routed the Roman cavalry, encircled the Roman infantry. 50,000 Romans fell in battle, 20,000 were taken prisoner. Carthaginian losses 5,000. |
| Battle of Zama 202 |
Final battle in the 2nd Punic War. A recently recruited, untrained Carthaginian army under command of Hannibal was routed by a Roman-Numidian army. |
| Battle of Cynoscephalae 197 |
Roman victory over Macedonia under Philip V. Macedonia deprived of its status as great power. |
| Battle of Thermopylae 190 |
Seleucids under Antiochus III. the Great defeated by Romans. |
| Battle of Magnesia 190 |
Seleucids under Antiochus III. the Great defeated by Romans. |
| Battle of Pydna 168 |
Macedonians defeated by Romans; Macedonian king Perseus fled. Macedonia was annexed by Rome. |
| Battle of Noreia 113 |
Defeat of a Roman force by the Cimbri, Teutones and Ambrones, Germanic resp. Celtic tribes migrating southward in search of new, better lands to settle. |
| Battle of Arausio 105 |
Third successive defeat of a Roman force by the combined force of the Cimbri, Teutones and Ambrones. The defeat caused a panic in Rome; Marius was appointed commander. He reorganised the Roman army. |
| Battle of Aquae Sextiae 102 | The Teutones (they had split from the Cimbri) marched by Marius' camp and offered battle, which Marius refused - the Teutones regarded him a coward. They continued their march. Marius follwed them and attacked while they were on the march, unprepared for battle. A Roman victory; the surviving Teutones were sold into slavery. |
| Battle of Vercellae 101 |
Marius accepted the Cimbri offer of battle and selected the battlefield so that the Cimbri had to fight facing the descending sun. A Roman victory; the surviving Cimbri were sold into slavery. |
| Battle of Pharsalus 48 | Roman Civil war. Caesar's experienced legions defeated the legions Pompey recently had raised in Greece. The battle was decisive; Pompey fled to Egypt, where he was assassinated. |
| Battle of Thapsus 46 | Caesar's legions defeated an army loyal to the Republic. Caesar's victory brought him control over Africa. |
| Battle of Munda 45 | The final battle in the civil war. Caesar defeated a republican army commanded by Pompey's sons. |
| Twin Battle of Philippi 42 | Actually it were three battles, fought within a period of two weeks. At first two republican armies, one commanded by Brutus, the other by Cassius, faced two Caesarian armies, one of them commanded by Mark Antony. M. Antony defeated and eliminated Cassius, while Brutus was victorious - and both commanders unaware of what had happened in the other battle fought simultaneously nearby. In the third battle, Mark Antony and Brutus fought it out, M. Antony prevailing, Brutus committing suicide. |
| Battle of Actium 31 | A Roman-Egyptian fleet under Marc Antony and Cleopatra was defeated by a Roman fleet under Octavianus and Agrippa. Alexandria fell in 30; Egypt was annexed by Rome. |