Timeline of the Roman Empire.

8th century BC
A graphical timeline is available here:
Timeline of the Roman Kingdom
753 BC – Traditional date for the founding of Rome by Romulus; Rome as a kingdom
753/715 BC – reign of Romulus
715/673 BC – reign of Numa Pompilius: creation of the Roman senate and the priestly offices
712 – reign of hayley

7th century BC
673/642 BC – reign of Tullus Hostilius: building of the Curia Hostilia – the senate-house
642/617 BC – reign of Ancus Marcius
617/578 BC – reign of Lucius Tarquinius Priscus: building of the Circus Maximus, Rome gets the first system of sewers

6th centuary BC
578/534 BC – reign of Servius Tullius: defined the sacred boundary of Rome - the pomerium; first census
534/509 BC – reign of Lucius Tarquinius Superbus, the last Roman king: builds temple of Jupiter Optimus Maximus
509 BC – Roman Republic begins: expulsion of Tarquinius Superbus: first consuls are Lucius Junius Brutus and Lucius Tarquinius Collatinus
508 BC – The office of pontifex maximus (high priest) is created

5th century BC
496 BC – Rome defeat the Etruscans at the battle of Lake Regillus
494 BC – Following the first Secession of the Plebs, two tribunes of the plebs and two plebeian aediles are elected for the first time
459 BC – The college of the tribune of the Plebs is raised from two to ten tribunes
449 BC – The Decemviri publish the Twelve Tables of Roman law
447 BC – Assembly of the People created: two quaestors elected for the first time
445 BC - Marriage between patricians and plebeians allowed
443 BC
The office of consul is replaced by an assembly of military tribune with consular powers, the Tribuni militum consulari potestate for this year.
Office of Censor created. Duties of Censor were Consular duties until this point, where consuls are replaced.
421 BC – Number of quaestors raised from 2 to 4; office opened to plebeians
408 BC – Consul replaced with Tribuni militum consulari potestate .

4th century BC
396 BC
Rome captures and sacks the Etruscan city of Veii after a 10-year siege, the final assault was conducted by Marcus Furius Camillus
Roman soldiers earn their first salary
394 BC – Office of consul replaces Tribuni militum consulari potestate.
391 BC – Office of Tribuni militum consulari potestate replaces office of consul.
390 BC – The Gauls defeat the Roman army at the battle of the Allia; sack of Rome by the Gauls
375/371 BC – Anarchy years: no magistrates elected
367 BC – Office of consul replaces Tribuni militum consulari potestate for last time.
366 BC –
Elected the first non-patrician consul: Lucius Sextius Sextinus
Office of Praetor urbanus created
351 BC – Elected the first non-patrician censor
343 BC – Beginning of the First Samnite war
342 BC
Battle of Mount Gaurus.
Lex Genucia passed: no man can hold the same office before 10 years have elapsed from the first election
341 BC – Rome withdraws from the conflict with the Samnites. End of First Samnite war.
340 BC – Rome enters the Latin War on the side of the Samnites.
338 BC – End of the Latin War. Latin League dissolved, and territory placed under Roman control.
326 BC – Second Samnite war begins.
321 BC – Battle of the Caudine Forks.
316 BC – Battle of Lautulae.
311 BC – Etruscans join the Samnites against Rome.
310 BC – Battle of Lake Vadimo between Rome and the Etruscans.
308 BC – The Second Samnite war escalates when the Umbrians, Picentini, and Marsians join the war against Rome.
306 BC – The Hernici revolt against Rome (Livy ix. 42).
305 BC – Battle of Bovianum ends with Samnite defeat and the end of main Samnite resistance.
304 BC – Aequi defeated.
304 BC – End of the Second Samnite War. Rome establishes many new colonies and gains control over much of central and southern Italy.
300 BC – Lex Ogulnia passed: priesthoods opened to plebeians


[edit]
2nd century BC
197 BC
Hispania Ulterior and Hispania Tarraconensis become Roman provinces
Number of quaestors raised from 8 to 12; number of praetors raised from 4 to 6
192/189 BC – Syrian war against the Seleucid dynasty
180 BC – Lex Villia annalis: established minimum ages for the cursus honorum offices; determined an interval of two years between offices
172/167 BC – Third Macedonian War, Roman victory
154/138 BC – War against the Lusitanians
149/146 BC – Third Punic War against Carthage
149/148 BC – Fourth Macedonian War
149 BC – A permanent extortion court is established by Lex Calpurnia
146 BC – Scipio Aemilianus Africanus (Scipio Africanus the Younger) puts an end to the Punic and Macedonian threat by destroying the cities of Carthage and Corinth; Macedonia and Africa are annexed as provinces
133 BC – The tribune Tiberius Gracchus is murdered after approving an agrarian reform
121 BC
Rome acquires the province of Transalpine Gaul (south of modern France) and a safe land route to Hispania
The Senate approves the first Senatus consultum de re publica defenda to deal with the threat of violence started by tribune Gaius Gracchus
112 BC – Jugurthine War against king Jughurta of Numidia begins.
107 BC
Gaius Marius elected consul based on election promise to end the war in one year.
Marian reforms of the Roman Legions put into effect.
106 BC
Gaius Marius elected consul a second time, and in absentia, to continue the Jugurthine War.
105 BC
Jugurthine War ends with the capture of Jughurta.
The invading tribe of the Cimbri inflict a major defeat on the Roman army in the battle of Arausio
104/102 BC - Gaius Marius elected consul for three years in a row
102 BC - Consular armies under Gaius Marius defeat Teutons in the Battle of Aquae Sextiae
101 BC - Romans under Marius (proconsul) and Quintus Lutatius Catulus (consul) defeat the Cimbri in the Battle of Vercellae
100 BC
Gaius Marius elected consul for a 6th time.
Political scandal surrounding Lucius Appuleius Saturninus forces Gaius Marius to retire from public life.

1st century
5 – Tiberius conquers Germania Inferior
6 – Judaea becomes a Roman province
6/9 – Rebellions in Pannonia and Dalmatia suppressed by Germanicus
9 – Three Roman legions are ambushed and massacred by the Germans in the Battle of the Teutoburg Forest
11 – Germania Inferior and the Rhine secured by Germanicus
14 – Death of Augustus, Tiberius becomes emperor
14/15 – Germanicus campaigns against the Germanic tribes
25 – Caesar Germanicus adopts his nephew Castor as his heir
26 – Tiberius retires to Capri, governing Rome by proxy
28 – The tribe of the Frisii rebel because of taxes
31 – The fall of Sejanus
37 –Caligula becomes emperor
41 –Claudius becomes emperor
43 – Claudius orders the Roman invasion of Britain
54 –Nero becomes emperor
58/63 – Nero orders war then peace with Parthia. Armenia is secured.
60/61 – Boudica, queen of the Iceni, leads a rebellion in Britain
64 – Great Fire of Rome
66/74 – Jewish rebellions in Judea
68 – military coup leads to Nero's suicide – end of the Julio-Claudian dynasty; succeeded by Galba
69 – Year of the four emperors: after the assassination of Galba, Otho and Vitellius briefly become emperors before Vespasian's accession to power in the end of the year; Flavian dynasty begins
69/70 – Civilis leads the Batavian rebellion in Germania Inferior; defeated by Quintus Petillius Cerialis
71/84 – Pacification of Britain, conquest of modern Wales and Scotland
79-Titus becomes emperor

August 24, An eruption of Vesuvius destroys much of Pompeii and Herculaneum
80 – Rome partially destroyed by fire
81 – Domitian becomes emperor
85 – King Decebalus of Dacia rebels and invades Moesia
89 – Rebellions in Germania Inferior and Pannonia force peace with Decebalus of Dacia
96 – Domitian killed – end of Flavian dynasty; succeeded by Nerva, the first of the Five good emperors
98 – Trajan becomes emperor