8th of Makara, 0 AS - Horizon Disaster, a year 0 of After-Sorrow era. An failed attempt at teleportation technology creates a rift to another dimension (and unknowingly to other, actually transports entire planet to alternate universe). Immaterial Spirits are released to the world, causing cascade failing effect on almost all advanced technology, destroying electronics.
10th of Makara, 0 AS - Entire planet is engulfed in darkness. Most advanced technology doesn't work.
0 AS - 9 AS Age of Sorrow. Era without any record. World is in chaos, population leaves major cities, dispersing around the globe.
9 AS - 30 AS Age of Reconstruction. Civilisation starts to rebuild, a majority of known scientific principles are still functioning...
10 AS: The Martian Commonwealth is restored to power in Hellas Capitolina, and start a long process of rebuilding.
21 AS: The first year where there was a concrete evidence of the manifestation of Magery. The Elysians count this as the first year of their religion.
31 AS - 60 AS: The Age of States. The State of Elysium comes into an existence during this era and was first to recognize Magery as what it is, in 33 AS. Over time the Mage-priests comes to dominate the Elysian politics.
61 PS~85 PS: The Age of Soldiers. In 79 PS, as the Great War looms over the Mundus, three formerly feuding states decide to form a military alliance in recognition of their shared belief and form the Dar-es-Salaam.
The Great War breaks out in 84 PS, and last 42 months till 85 PS. The Plague starts in 38 months into the war.