I have the opposite issue because I know nothing of Demon: The Fallen.
I'm mostly going off of Werewolf and Vampire, and I think the point of divergence is far back enough that most Mage/Hunter organizations are unrecognizable if they develop at all.
I must admit I am not the most knowledgable individual when it comes to WoD timeline, chances are some of the things I mentioned might not even apply (Anarachs were a result of the 20th century I think, but chances are splinter groups similiart to them existed prior).
If someone is more well versed in timeline comparisons feel free to correct things, and should they require the TC currently public WIP timeline:
1099 – First Crusade captures Jerusalem. The Knights
Templar commit the Act of Ultimate Heresy. The Gate
of Hell is opened on Earth and Jerusalem is destroyed in
the cataclysm.
1101 – The Year of Three Battles. Heretics, reinforced
by the armies of the Third Circle of Hell, conquer most
of the Levant.
1102 – The ancient city of Antioch is fortified and
becomes the focal point of resistance against the forces
of Hell.
1106 – Cobar becomes the First Tyrant of the Sixty-six.
1109 – The Great Sultanate of the Invincible Iron Wall
of the Two Horns That Pierce the Sky is formed. In the
coming decades it unifies the Islamic factions. The Great
Iron Wall of Iskandar re-emerges and is fortified against
the Heretics.
1117 – The legendary Seventeen Martyrs travel to
the Earthly Domains of Hell to convert the Heretics.
Captured, tortured and kept in a perpetual state of
agony, they remain trapped within white-hot Brazen
Bulls to this day.
1165 – The Old Man in the Mountain and his
Hashashins defend the mountain fortress of Alamut.
The castle stands to this very day, despite being besieged
for hundreds of years.
1215-1306 – The Wars of Triclavianism. The Church
is split and fights a fierce internal conflict. Heretic
domains extend as the faithful fight against each other.
Millions perish by sword and fire.
1346-1353 – Beelzebub unleashes the Black Grail.
Tens of millions are infected, becoming metastatic
vessels in the worst plague in the history of mankind.
The Corpse Wars begin.
1429 – Living Saint Jeanne d'Arc drives the Black
Grail from mainland Europe.
1477 – The City of Argos is taken by God and it is no
more.
1503 – War Prophet Angelos, guided by St. Elegius,
discovers the formula of Orichalcum Steel. Though
extremely costly to produce, the metal proves to be
effective against all missile weapons and is still used to
this day.
1545 – Antioch destroyed utterly by a mysterious
infernal weapon
.
1573 – Sacred Order of the Dragon halts the heretic
advance after the destruction of Byzantium. A million
heretics impaled in the hills of Wallachia.
1595 – Walls of New Antioch completed.
1666 – The Year of Six Woes. In a surprise raid, the
newly created Heretic fleet captures Gibraltar. The sea
fortress becomes the Heretic base of operations against
Europe. Forces of Hell gain access to the Atlantic.
1670 – Due to the constant coastal raids by the Heretic
Fleet the Crown of England begins the construction of
the Fortress of the White Cliffs.
1703 – Against all odds, a small force of Hebrew
Knights striking from their secret fortress destroy the
Templar stronghold at Acre.
1805 – Heretic fleet under the command of High
Captain Ranga defeats the fleet of England in the
Battle of the Bloodied Cliffs. Admiral Nelson is slain in
combat.
1866 – In the utmost secrecy Heretic scientists, aided
by the Demon Marbas, construct the first modern
submarines.
1870 – Launched from Gibraltar, the Heretic
submarine fleets extract a heavy toll on the merchant
navies. Widespread famine ensued.
1872 – Heretic forces storm the city of Rijeka. It is
fortified and Heretic conquest is launched against the
European mainland.
1894 – The Year of Broken Trinity. The Death
Commandos simultaneously assassinate the Supreme
Pontiff, the High Prophetess Aelia and the Holy Roman
Emperor. The faithful are thrown into turmoil. The
Heretic Legions, commanded by Hell's nobles of the
Seventh Circle and a huge vanguard of tanks launch
a simultaneous lightning offensive in the Levant and
Europe.
1899 – Church Space Program commences.
1907 – The construction of the moving fortress of
Britannia is completed.
1910 – Battle of Cordoba. A Bloody stalemate. Heretic
artillery devastates the ancient city, but the Heretic
forces fail to gain access to the heartlands of Hispania.
1914 – The present day. Both sides are preparing for
major offensive operations. In the huge swathes of No
Man's Land furious skirmishes and raids increase in
intensity as the faithful and heretics vie for information,
powerful relics and securing strategically important
positions.