The Dune Front Timeline

Year	Continent	Description
861	Pteris	The Seven Cities of Pteris are forced into an alliance with the Ancient Blue Dragon Hyarn. Under the dragons orders, they begin to prepare their armies for war.
864	Pteris	The Seven Cities invade the region of Oppidan, invading the city of Holtston and launching an assault on the City of Dardin.
865	Pteris	The Oppidan War Peacetalks Commitment (OWPC) comes to Dardin’s aid and push the Seven Cities back to the Tavorel River.
869	Pteris	The OWPC manage to liberate the city of Holtston, only to be forced to abandon the city by a trio of adult dragons sent by Hyarn.
871	Pteris	The Seven Cities open a rift to the Elemental Plane of Water within the Tavorel River and summon violent water elementals, disrupting the OWPC's naval fleets.
875	Pteris	A legion of Seven Cities soldiers cross the Fiddlehead Mountains and attempt to march on Jewelspar before being pushed back into the mountains by Jewelspar soldiers.
879	Pteris	Hyarn attacks the city of Dardin. Dardin pulls out of the war and its people retreat to the underground tunnels created by their ancestors during The Holy War.
880	Pteris	Fighting in the Fiddlehead Mountains disrupts local Stone Giant and Hill Giant populations who begin attacking both Jewelspar and Seven Cities soldiers.
881	Pteris	Hyarn attacks the city of Granite. Granite remains in the war.
882	Pteris	The OWPC meets with Clan Aeigirborn, a clan of Storm Giants who lives in the Fiddlehead Mountains and who command all the giants in the region. In what would later become known as the Thunderpeak Accords, the OWPC negotiates safe passage for their armies through the mountains.
884	Pteris	OWPC soldiers cross the Fiddlehead Mountains and attack the city of Cansthum, on eof the Seven Cities, taking the city in three months.
884	Pteris	In response to the fall of Cansthum, the Seven Cities begin to execute prisoners of war.
886	Pteris	The Seven Cities push past the Tavorel River and attack the city of Lunas. Before being pushed back, the manage to poison the city's water supply.
888	Pteris	Seeing no other option, the government of frees the Lich Wyrkarm the Deathless Heirophant from their prisons in return for Wyrkarm assisting in the war effort.
890	Pteris	The Lich Wyrkarm the Deathless Heirophant burns down the city of Mam'laka, one of the Seven Cities.