A series of crusades organized to resist the spread of the Worldwound, a demon-haunted wasteland at the northernmost reaches of central Avistan caused by a planar tear.
Mendevian Crusades
War Chronicle
Precursors to the Crusades 4,433 — 4,622
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Avistan Saved
4433 ARAroden defeated a cult dedicated to the demon lord Deskari, driving the survivors into the Lake of Mists and Veils and making the north of Avistan safe from demonic influence.
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Emergence of the Worldwound
4606Coinciding with the death of Aroden, Golarion moved into alignment with the Outer Rifts, and the Worldwound was opened by the witch Areelu Vorlesh working in conjunction with her demonic patron, Deskari. Demons poured out, and overran the barbarian nation of Sarkoris. As the Worldwound grew ever larger, it came to be seen as a threat to the entire world
The First Crusade (AR) 4,622 — 4,630
Second Mendevian Crusade 4,638 — 4,645
Third Mendevian Crusade 4,665 — 4,668
Fourth Mendevian Crusade 4,692 — 4,707
Fifth Mendevian Crusade 4,713 — 4,718
The Fifth Mendevian Crusade rose from the stalled efforts of the Fourth, and was sparked by a demonic assault on Kenabres in 4713 AR. Although demons ripped the city's defenses apart in minutes and destroyed its wardstone, a small group of defenders inadvertently gained the wardstone's mythic powers and led Queen Galfrey's defenders in what was soon called the Fifth Crusade.
The ensuing five-year campaign was the most successful of them all. In 4718 AR, the heroes slew the demon lord Deskari and ritually sealed the Worldwound, leaving only the Sarkoris Scar and what demons had been stranded upon the surface.