TIMELINE
Here follows a timeline focused on war and troubles (that's the easy part!). I have done that lengthy work hoping it will help to build a tech tree which can reflect the main events that should happen during the game. Obviously, we will need some more on the economy, art, religion and so on.
The Rise [272BC-27BC]
272BC Game starts with the peace treaty between Rome and Phyrrus of Epire, following his defeat. Rome possesses all southern and central Italy.
264BC-227 BC 1st Punic War. Rome gets Sicilia (but Syracuse, which remain Greek) and then Sardinia and Corsica
229BC-228BC Defeat of Illyrian pirates, the Illyrian coast is roman (219BC)
222BC Cisalpine Celts attack and are defeated, the region become roman
237BC-219BC Great Leaders (Barcas) in Carthage, who conquer the eastern Spanish coast, leading to
218BC-202BC The 2nd Punic War, with hard fight accross Italy between Carthage allied with the Celts and then Macedonia (Phillip V) versus Rome. Mutliple roman defeats first. Then come some naval success for Rome, followed by a victory in Spain. Rome gets an ally with Numidia (212 BC). Syracuse joins Carthage but is conquered by Rome (212BC), while Hannibal devastates the south of Italy. Greeks states allied with Rome attack Macedonia. By 211BC, Roman success in southern Italy versus Hannibal and great leader (Scipio) takes Spain and defeat the Carthaginian in Italy. In 204BC, war passes in Africa, and Carthage is finally defeated at Zama in 202BC. Spanish coast is Roman (and the rest will be progressively conquered in the next century). Consequences of the war: increased use of slaves in large estates, devastation of the land of Southern Italy, and disappearance of the Italian farmers.
200BC-190BC Stabilization and colonization of Northern Italy
200BC -197BC War with Macedonia-Seleucids, Rome is allied with the Greeks and Egypt. Phillip Vs power is broken
192BC- 188BC Rome at war versus the Seleucids (Antiochos III) allied with some Greeks (Etolia) against Egypt. Etolia is conquered; the Seleucids are split apart at the advantage of roman allies (Pergame and Rhodes), only remaining in Syria.
171BC-168BC Another war against Macedonia which is defeated and annexed in 148BC, together with Achaia (146BC).
136-132BC First revolt of the slaves in Sicilia, who are defeated
133BC Pergame becomes Roman pacifically
149BC-146BC 3rd Punic War initiated by the roman ally, Numidia. Carthage is destroyed.
111BC-105BC War with Numidia (Jugurtha), which is defeated and becomes Roman
113BC-101BC Roman defeats against Germanic invasions, leading to a reform of the army (real apparition of professional legions, using cavalry). The Roman finally defeat the invaders.
133BC-89BC Social unrests concerning the agrarian law
88BC-81BC Two wars versus Pontus (Mithridate VI) who attack Rome, but is defeated.
88BC-82BC Civil war at Rome between Sylla and Marius/Cinna
74BC-64BC Bithynia also becomes Roman. Last war versus Mithridate VI, with roman defeat first, but Pontus is finally annexed. Galatia, Cappadocia, Armenia and Judaea are under roman influence.
73BC-71BC Revolt of slaves (Spartacus), they are defeated.
53BC Wars with Parthes
58BC-51BC Caesar defeat the Gauls and invade Germania and Britannia, before turning back and conquering the Gauls, after defeating Vercingetorix.
52BC-45 BC Civil war between Caesar and Pompee and his successors, who are defeated in several campaigns. Caesar is assassinated in 44BC
44BC-27BC Civil war continue between Octave, Antoine, Sextus Pompee. War with the Parthes. Octave wins, annex Egypt, and is proclaimed Augustus in 27BC.
The Apogee [27BC-235AC]
27BC-25BC Galatia becomes Roman
12BC-9BC and 14AC-16AC Successful wars in western Germania.
14AC-41AC Weak Emperors
43AC Conquest of Southern Britannia
46AC Colonization of Thracia
62AC-69AC Trouble related to Nero
66AC-70AC Troubles in Palestine and conquest of Jerusalem
74AC Coliseum built and eruption of Vesuvius later on
78AC Britain conquered up to Scotland and protected by a wall
98AC-117AC Golden Age under Trajan, who conquer Dacia, Northern Arabia and Sinai, and defeat the Parthes (conquers Armenia, Assyria and Mesopotamia).
117AC-138AC Hadrien (still Golden Age?). Rome comes back to the Euphrates border, and limes are built in Britannia, on the Rhine, Danube and Euphrates. New Jewish revolt.
138-161AC Antonin. Limes and further reinforced. Army is strengthened by the recruitment of auxiliaries (from local populations).
161AC-180AC Marcus Aurelius. Fight the Parthes and occupy Mesopotamia but Steppes tribes cross the Danube (Marcomans, Sarmates, Quades) who are defeated
180AC-192AC Commodus, mad. Another Marcoman invasion succeed. Followed by troubles in Italy, Britannia and Africa.
193AC-211AC Septimus Severus. Defeat the Parthes, develop Syria and Africa. Decadence of the Senate. Defeat in Britannia.
212 AC Antonine Constitution. All free people get Roman nationality. Unity of the Empire. Beside, fight on the Rhine (Alamans) and the Euphrates (Parthes).
231AC-232AC Another invasion by Parthes and Marcomans, plus revolt of legions.
The Migrations [235AC-375AC]
Continuous attacks from Germanic tribes, Sarmates, Persians, Berbers, Maures, etc. Progressive implantation of Germans into roman territory.
227 AC New Sassanid Empire taking over the old Parthes
235 AC-244 AC Fight with Alamans and Persians. Germans mercenaries take more and more importance.
250AC First Christian persecutions
253AC-271AC Massive attacks from the Rhine to the Danube, while Africa is under siege by the Maure tribes. Abandon of the limes in Rhetia and Higher Rhine. Dacia is lost.
270AC-275 AC Aurelius put back some order by defeating Germans and revolting provinces turned into empires (Gallia, Palmyra).
284AC-305AC Diocletian. Division of the Empire into dioceses. Internal strengthening.
324AC-337AC Constantin the Great, who proclames Byzantium as the capital of the Empire. Great strengthening of the army (75 legions) and division of the Empire into 4 prefectures.
357AC-375AC His successors defeats Germans along the Rhine but Armenia is lost to Persia. Limes in Britannia and Rhine are consolidated.
375AC Huns invasions start
The Great Invasions [375AC-568AC]
375AC-382AC Wisigoths defeat the Romans at Andrinople. Goths established in the Empire.
380AC-391AC Catholicism become state religion
394AC-395AC Theodose the Great. Division of the Empire in two. End of the Imperial unity. (Occident, capital Ravenna; Orient, capital Constantinople)
401-415 AC The Wisigoths invades Italy, are defeated but nonetheless ransom then plunder Rome, before moving to Africa then a kingdom around Toulouse.
406AC-429AC The Vandals cross the Rhine, go through the Gauls and Spain before crossing to Africa where to build their kingdom.
441AC-453AC Attila attacks Byzantium, before moving west where he is defeated at the Battle of the Catalaunic Fields by an alliance of Romans, Gauls and Germans.
450AC-486AC The Franks invade northern Gaul, and under Clovis, defeat the Kingdom of Syagrius.
451AC The Ostrogoths establish themselves in Pannonia, plunder the Balkans.
476AC The last Roman emperor for the Occident (Romulus Augustus) is deposed by Odoacre.
488AC The Ostrogoths enter Italy, defeat Odoacre and build their kingdom
That's it, although we may want to include an additional few decades to have a chance to play Constantinople
I did that quickly, so it is very prone to contain gross mistakes. Now, what main events do we keep in mind and how could we implement them?
I get back to work, I mean
real work