Here is a number of tls that I have thought on some, but cannot do as of the moment, due to my current Assyrian timeline:
The Radiant Justice of Mithra Shines once More!
A tl covering the implications of the victory of Bahram Chobin Mihran over Khosrau II and Eastern Emperor Maurice. The basis of this, is that Vistahm and Vindyih Ispahbudhan both slay Hormizd IV and take Khosrau II to Syria to plan a return to power of the Sassanid royalty. In otl, this came with Maurice giving his support to the young Great King. However, the Sassanid counter invasion, while also an Roman army, was most thoroughly supplemented by the armies of the Bagratuni of Armenia under King Smbat IV. The Armenians, Khosrau II, the Isphahbudhan and the Byzantines essentially battled Bahram and defeated him in the civil war, before Bahram fled to the east, joining the court of the Celestial Turks.
The POD would be, in the days when Bahram expelled Khosrau II, he sent word to Smbat of Bagratuni regarding their situation. He stated in very plain terms, that he wished to make cause with the children of the Arsacid clan and to rebuild Eranshahr under a new a righteous dynasty. He offered the Bagratuni a place as a ruling noble clan alongside his Mihran clan and the two alongside the other nobles, would rule the empire under a restored Confederacy. In otl, the Sassanids performed this relation with the Suren and the Ispahbudhan; Bahram wished for his Mihran clan to rule and at their side, would be the dual rulers, the Armenian Bagratuni. What if Smbat IV accepted Bahram's offer and the Armenians instead of joining Khosrau II, joined the new Mihranid empire and fought the Sassanids along with Bahram?
Thus, Bahram and his Armenian allies battle Khosrau II, the Ispahbudhan clan and Maurice in Iraq. Owing to the legendary skill of Bahram, the Mihranid-Armenian army defeats the Sassanid restorationist army and Maurice after the failure returns to Imperial lands to plan how to recapture Armenia. Meanwhile, we say Khosrau II is captured and slain by the new emperor as Ardashir I had done to the last Arsacid Great King.... Following this, Bahram makes peace with the Ispahbudhan, Suren and other clans. Bahram further marches to the lands of the Karenids and gains from them agreement in the new confederacy.
In essence, a new empire is borne and a third dynasty arises, the Mihranid dynasty. In short order, the Sassanids are reviled in history as fanatics, low born usurpers of pristine Parthian-Dahae noble lineages and were punished by the God Mithra for their transgressions. We see too, the resurgence of Iranian polytheism, Iraqi polytheism, the end of Iranian standing armies, empowering of the nobility, the proclamation of the Mihranid clan kings as heirs of Mithra and saviors of the world, the decline of Zoroastrianism and so forth.
An Eastern Star Moves West
This is another post-Sassanid tl, centered upon Iran. In otl, the Celestial Turk Empire, ruled by the divine Ashina clan began to unravel in the middle 7th century under pressure from the Tang Dynasty of China and from the Tibetan empire. This effect began to creat effects in the 8th century with the complete fall of the Celestial Turkic empire in the steppe and the flight of the Ashina clan to the Pontic steppe, often referred to as the Khazars. However, what if this occurred in a different direction?
What if the Ashina clan moves not into the Pontic steppe, but pushes into Eranshahr? The idea is that the Ashina invade either the ailing Sassanid empire or the Islamic caliphate and makes common cause with the Karenids and Surenids and form with them, a Confederacy, restoring Eranshahr. The Ashina prepare then and invade the rest of Iran, conquering it and restoring the empire, which comes to be called, the Ashinid Empire. A Turkic dynasty on the throne of Eranshahr, with a religious ideology of a divine bloodline of godly steppe warriors molding to the existing Iranian situation of the noble houses and their bloodlines and the existing religious condition, gives us many interesting possible occurrences. Not to mention, a possibly more eastern focused empire, that attempts to expand against the Tang, Tibet and set a border at the Indus. Further, greater migration and connection between Turks and the Indo-European sphere than even otl will be achieved.
A City Arises from the Swamp
This would be a tl with a POD set in the Zanj rebellion. It concludes a death of al-Muwaffaq in his early campaign against the Zanj. This leads to a Saffarid invasion of Iraq as otl, but without the great Caliphal regent and his prowess in warfare. Instead, what develops in Iraq, is an Abbasid caliphate slowly breaking at the seems, a rising Saffarid empire and the Zanj developing for themselves a powerful realm in the south and Arabia. This would msotly deal with cultural, state and religious developments within the Zanj realms of the south and the legacy that they would create if not destroyed in a single war, but instead developed separately. So, this would include, the development and a atl discussion of the expansion and culture of the Zanj capitol of al-Mukhtara and the Zanj controlled Mecca. Further, the atl would expand to include the rising Qarmatians, the Tulunids, the Samanids, the Fatimids and the Byzantine counter upon the caliphate, in deep decline.
If these are of interest to you guys, do tell! It is possible that I write them someday after my Assyrian timeline is finished or due to reasons, made obsolete.
You have any scenarios who maybe you do not think you will ever wrote but still is stuck in your mind?
I have an entire spreadsheet dedicated to precisely this and nothing else. Here's a few highlights:
Children of Mars: This is less of an alternate history than a historical thought experiment. The traditional history of the archaic/regnal period of Rome is well-known, but almost certainly fictional and even more recent events, even after the Gallic sack of Rome, are likely very inaccurate, or at least embellished. This TL would break down the development of Rome's institutions (the senate, assemblies, magistracies, laws, etc) in a narrative with well-known characters (Brutus, Cincinnatus, etc) who bear little or no resemblance to the traditional characters. This narrative would have an interesting twist on the various innovations of the Roman state such as a later establishment of the consulship than is traditionally assumed, a gradual rather than abrupt abolition of the monarchy, and a much more intense patrician-plebeian struggle involving the various nearby Latin and Italian tribes.
A Desert Called Peace: The POD for this would either be the premature death of Marius or Sulla, and the subsequent total collapse of the Roman Republic under pressure from Pontus, Spanish tribes, Germanic tribes, and the Italian allies which would revert the political landscape of the mediterranean back to it's pre-Roman state. This would entail an independent Greece, mercantile free cities dominating the West, and various migrations threatening the inhabitants of coastal areas without a large central authority to address these. It would be a very chaotic time and place for the Mediterranean right on the cusp of the Sarmatian, Parthian, and Germanic waves of expansion that occurred in IOTL's 1st century BCE, and, although it would likely focus on Rome and Greece, the possibilities for creating totally new political amalgamations is limitless.
Clemency of the Guard: Claudius is caught up in the downfall of Sejanus and killed, leaving Caligula as the only Julio-Claudian left by the time of Tiberius' death. This total lack of any other acceptable heir makes the praetorian guard less apt to assassinate Caligula, and he is able to reign uninterrupted for much longer. It would either end in an alt-Caligula being assassinated (sparking civil war) or a long and prosperous reign for him, with a few hijinks in the meantime. Caligula is either succeeded by a natural son or by one of his nephews by his sisters (a Cassius Longinus, Marcus Lepidus, Junius Silanus, or even OTL's Nero).
To the Strongest: The premature death of Hadrian in the second Jewish War leaves the issue of succession very open-ended. The death of Trajan is followed by a Hellenistic-style period of civil wars, presaging the crisis of the third century with lots of bloodshed, inflation, disease, and other exciting stuff.
Sins of the Fathers: This would probably be the hardest one to research, because it would involve the early death of Constantine, which would have huge ramifications for world history and it would concentrate heavily on the socio-political developments of religion, army organization, and provincial administration in the late empire. The tetrarchy would last a little bit longer than IOTL by being divided between the dynasties of Maximian and Galerius, thus eliminating the marginalized sons that imploded OTL's tetrarchy.
Alaric's Wake: This is my next timeline in the works, involving the rise of Stilicho as a full emperor and member of the Theodosian dynasty. Stilicho would be succeeded by Eucherius, then by Constantius II, and his heirs would be in constant struggle with the house of Theodosius in the East as the German nobility of the West gradually took over the state in the same way that provincial soldiers did during the third century crisis.
And a dozen other TL's that only exist in one-sentence fragments in my notes dealing with the premature death/longer life of various Roman imperial figures from Augustus to Ricimer. A couple of particular interest to me are: the premature death of Augustus in 44 or 23 BCE, Sejanus becomes emperor, the Pisonian conspiracy succeeds, Verginius Rufus becomes emperor, Otho beats Vitellius, Pertinax establishes a dynasty, or a long reign for Caracalla.
I've even dabbled with non-Roman TLs in the past. Most of these are pretty run-of-the-mill and cliche, and they have scarcely any development beyond a brief description because I eventually settled on Roman history as my primary area of interest.
I also had an idea for a totally absurd ASB dystopia where aliens come to Earth in the form of biological warships, which are utilized by the various nations in an arms race which causes environmental collapse and chaos. It features a bunch of whacky countries including: super scary boogeyman Russia-China amalgamation, Kurdistan as a great power in the Mid East, the New Roman Empire in western Europe, a Japanese state in-exile in the Philippines, and a 1984/Matrix-esque hellscape USA run by caricatures of Mr. Monopoly.
- Sea Peoples establishing settled states. Basically a blank slate for me to do whatever I want with history
- No Macedonian conquest of Persia and subsequently no Hellenistic period. Or alternatively:
- Alexander's Empire stays together after his death (or at least the core parts of it like Macedon and Anatolia)
- No Islam
- The Mongols do to Europe what they did to China
- US keeps the articles of confederation
- Premature death of Karl Marx and the impact on European political thought
- Resurgent Ottoman Empire in the 19th century
- Yellowstone supervolcano erupts at some point (maybe during the ACW) and the implications for North America and the world
- My pet project "Fortune Favors the Cold" where Neanderthals and Homo erectus survive to the present day
Last one could be a warm-up to Defiance...
The first is a straightforward alternate history timeline where Ferrus Manus kills Fulgrim during the Dropsite Massacre. The Horus Heresy plays out as IOTL but after the war Ferrus Manus throws his support behind Rogal Dorn against Robute Guilleman. This significantly alters the trajectory of the 40k timeline and results in an Imperium with a more pan-Asian aesthetic. The Imperium, or Dai Man as it is come to be known, evolves into a centralised Confuscian-style Bureaucracy instead of the heavily decentralised theocracy of IOTL and as of the 41st Millennium is going through a multi-faction civil war following the expulsion of the Fang Dynasty (Qing analogue descendants of the Space Wolves and White Scars) and the Wars of Humiliation against the Gweilo. This timeline features not-Japan Ultima (known as Uroshima ITTL due to linguistic divergences), the Kroot as the not-American rising power of the Eastern Fringes, Alien Megacorporations seeking to plunder the wealth of Dai Man and flood their worlds with Drukhari narcotics, Warp Canals, Bureaucrats, Pirate Queens and the evolution of civilised Orkoids following the War of the Beast playing out very differently.