Here's everything I know about the Roman Empire, presented as (subject, predicate, object) triples. This will be extensive, so I'll try to categorize some areas for readability, but the core format remains.

**Foundations and Early Rome:**

*   (Roman Kingdom, existed, before Roman Republic)
*   (Roman Kingdom, was founded, 753 BCE)
*   (Romulus, founded, Rome)
*   (Romulus, was, first king of Rome)
*   (Roman Kingdom, had, seven kings)
*   (Tarquin the Proud, was, last king of Rome)
*   (Roman Monarchy, ended, 509 BCE)
*   (Roman Republic, replaced, Roman Kingdom)

**The Roman Republic:**

*   (Roman Republic, existed, 509 BCE - 27 BCE)
*   (Roman Republic, was, a republic)
*   (Roman Republic, had, a constitution)
*   (Roman Republic, had, elected officials)
*   (Consuls, were, chief magistrates)
*   (Senate, advised, consuls)
*   (Senate, was composed of, patricians)
*   (Plebeians, were, common citizens)
*   (Plebeians, gained, political rights)
*   (Twelve Tables, codified, Roman law)
*   (Roman Republic, expanded, territory)
*   (Roman Republic, fought, Punic Wars)
*   (Punic Wars, were, against, Carthage)
*   (Hannibal, was, Carthaginian general)
*   (Scipio Africanus, defeated, Hannibal)
*   (Roman Republic, conquered, Greece)
*   (Roman Republic, conquered, parts of Gaul)
*   (Roman Republic, experienced, social unrest)
*   (Gracchi brothers, advocated, land reform)
*   (Marius, reformed, Roman army)
*   (Sulla, was, a Roman dictator)
*   (Civil wars, plagued, late Republic)
*   (Julius Caesar, became, dominant figure)
*   (Julius Caesar, conquered, Gaul)
*   (Julius Caesar, crossed, Rubicon)
*   (Julius Caesar, won, civil war)
*   (Julius Caesar, became, dictator for life)
*   (Julius Caesar, was assassinated, 44 BCE)
*   (Second Triumvirate, formed, after Caesar's death)
*   (Octavian, was, member of Second Triumvirate)
*   (Mark Antony, was, member of Second Triumvirate)
*   (Lepidus, was, member of Second Triumvirate)
*   (Octavian, defeated, Mark Antony)
*   (Battle of Actium, was, decisive battle)
*   (Octavian, gained, sole power)

**The Roman Empire (Principate/Early Empire):**

*   (Roman Empire, began, 27 BCE)
*   (Octavian, became, Augustus)
*   (Augustus, was, first Roman Emperor)
*   (Augustus, established, the Principate)
*   (Pax Romana, existed, during early Empire)
*   (Pax Romana, was, a period of peace)
*   (Roman Empire, reached, its greatest extent)
*   (Trajan, was, an expansionist emperor)
*   (Hadrian, built, Hadrian's Wall)
*   (Roman Empire, incorporated, vast territories)
*   (Roman Empire, had, a strong army)
*   (Roman army, was composed of, legions)
*   (Legions, were stationed, along borders)
*   (Roman Empire, developed, extensive infrastructure)
*   (Roman Empire, built, roads)
*   (Roman Empire, built, aqueducts)
*   (Roman Empire, built, bridges)
*   (Roman Empire, had, a complex legal system)
*   (Roman law, influenced, later European law)
*   (Roman Empire, had, a sophisticated economy)
*   (Roman Empire, traded, widely)
*   (Roman Empire, used, coinage)
*   (Roman Empire, was, polytheistic)
*   (Romans, worshipped, a pantheon of gods)
*   (Jupiter, was, king of the gods)
*   (Mars, was, god of war)
*   (Venus, was, goddess of love)
*   (Emperor, was, often deified)
*   (Christianity, emerged, within the Empire)
*   (Christians, were persecuted, initially)
*   (Nero, persecuted, Christians)
*   (Colosseum, was used, for gladiatorial contests)
*   (Gladiators, fought, in arenas)
*   (Circus Maximus, was used, for chariot races)
*   (Roman architecture, was known for, domes)
*   (Pantheon, is, a famous Roman temple)
*   (Roman Empire, experienced, succession crises)
*   (Praetorian Guard, often influenced, emperor selection)

**Crisis of the Third Century and Dominate/Late Empire:**

*   (Roman Empire, experienced, Crisis of the Third Century)
*   (Crisis of the Third Century, involved, civil wars)
*   (Crisis of the Third Century, involved, economic instability)
*   (Crisis of the Third Century, involved, barbarian invasions)
*   (Diocletian, reformed, the Empire)
*   (Diocletian, established, the Tetrarchy)
*   (Tetrarchy, divided, empire into four parts)
*   (Constantine I, became, emperor)
*   (Constantine I, converted to, Christianity)
*   (Edict of Milan, granted, religious tolerance)
*   (Constantine I, founded, Constantinople)
*   (Constantinople, became, new capital)
*   (Roman Empire, officially divided, 395 CE)
*   (Western Roman Empire, had, Rome as capital)
*   (Eastern Roman Empire, had, Constantinople as capital)
*   (Western Roman Empire, faced, increased pressure)
*   (Barbarian tribes, migrated into, Western Empire)
*   (Goths, sacked, Rome)
*   (Vandals, sacked, Rome)
*   (Roman Legions, withdrew from, Britain)

**Fall of the Western Roman Empire:**

*   (Western Roman Empire, declined, gradually)
*   (Western Roman Empire, suffered from, internal strife)
*   (Western Roman Empire, suffered from, economic decline)
*   (Western Roman Empire, had, weakening army)
*   (Fall of Western Roman Empire, occurred, 476 CE)
*   (Romulus Augustulus, was, last Western Roman Emperor)
*   (Odoacer, deposed, Romulus Augustulus)
*   (Eastern Roman Empire, continued, as Byzantine Empire)

**Legacy:**

*   (Roman Empire, influenced, Western civilization)
*   (Roman Empire, left, a legal legacy)
*   (Roman Empire, left, an architectural legacy)
*   (Roman Empire, left, a linguistic legacy)
*   (Latin, is, root of Romance languages)
*   (Roman Empire, left, an engineering legacy)
*   (Roman Empire, developed, new technologies)
*   (Roman Empire, inspired, later empires)
*   (Roman Empire, is studied, extensively)
