In his time, Emperor Keyser of Arixo rose from nothing to the most powerful ruler in old North America. He unified the tribes of Red Rock country, became master of the Four Corners, and crossed the Colorado in triumph, smashing the forces of the upstart Californian Republic and claiming the gleaming city of Vegas for his capital.
And then he died, and his empire - that which he hoped would be the seed of a new American civilization - died with him.
The feared Malpais Legate, leader of the bulk of the imperial armies in California, was lifted onto his troops' shields and named the natural successor. He marched into Vegas in a glorious triumph and by all accounts, appeared to cement his position as Emperor. But he was not to be unopposed.
Prefect Lucius, one of the old Emperor's most trusted advisers, fled to the old capital of Flagstaff and arrayed many of the Empire's elites behind him, raising an army to rival the Legate's.
Tribune Gaius Magnus, leader of the Empire's conquest of Baja California and a major rival of the Legate, declared himself Emperor and marched back north, seizing much of Southern California.
Procurator Aurelius of Phoenix, ruler of the second richest province in the Empire, declared himself for the Legate and led a coalition of southern provinces to oppose the Prefect.
Prefect Silus of Cibola, an ambitious man, declared his province an independent kingdom and crowned himself Dux of all New Mexico. Moving his capital to the Rio Grande, he foresaw the final end of the empire and planned a new hydraulic empire under his dynasty, stretching all the way to the Gulf of Mexico.
Praetor Inculta of the Army of the North had been given the unenviable task of guarding the Long 15, the only link between the Imperial core and the rich border provinces of the old Utah and Colorado. As the Empire fell he kept to his duty, using his army to strongarm local governors and tribes to recognize him as the supreme authority in the absence of an uncontested Emperor.
Vexillarius Tiberius, leader of the military province of Denver, marched west with his legion and seized control of the depot of Circle Junction. Naming himself Magistrate of the Upper Colorado, he declared continued allegiance to the Empire but neutrality among the three claimants.
Propraetor Ulysses, governor of the isolated province of Chihuahua, was left isolated on the edge of the civilized world with just a handful of units as garrison, as imperial resources were redirected to the civil war. Pulling back to the province center, he prepared as best he could to hold out until the empire reunited and sent reinforcements.
But the reunification never came. The Legate and the Tribune, both seeing each other as the greatest threat, tore into each others' armies and both died at the brutal battle of Hesperia Pass. California fell into a chaos of squabbling statelets and never recovered.
The Prefect marched triumphantly into Vegas and claimed the imperial title, and spent the rest of his short life chasing the dream of reconquering the empire, reclaiming almost all of old Arizona and New Mexico before the earth reclaimed him. His heirs ruled in decadent indolence for almost another 500 years, slowly losing territory to younger, more vigorous powers.
The Procurator of Phoenix was the first victim of the Prefect's reconquest, losing his capital and the northern half of his kingdom. But he and his heirs rebuilt survived in the old border province of Sonora, becoming one of the dominant powers of Northern Mexico.
The Dux's grand plans never came to fruition. He soon faced the threat of a coup from a group of soldiers who declared their commander Emperor Lanius, throwing the kingdom into civil war. The Dux eventually won, but the war left his state vulnerable to the Prefect's armies, which easily seized the territory.
The Praetor quickly lost the province of Utah to a Canaanite revolt, and in the absence of this tax base, he proved unable to defend the Long 15 from the raiding tribes of Inner Nevada. His realm fell into dust within a generation, forever severing the tenuous link between East and West which so much blood had been spilt to build.
As the West fell into anarchy, the Domain of the Upper Colorado slowly turned eastwards and grew in power as the military orders of the Great Plains were slowly replaced by nomadic tribes. As the old Empire of Flagstaff declined, the heirs of the Magistrate claimed the title for themselves, becoming Emperors of Denver and ruling a good portion of North America for nearly a millennium and a half.
The Propraetor of Chihuahua held on against all odds, repulsing native rebellions as well as invasions from Sonora, Laredo and Texas. His heirs consolidated the realm into a mighty kingdom which survived over 900 years before being politically outmanoeuvred by a power of a new age.