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Dishonoring of Lyanna Stark
Rhaegar Targaryen is assumed to have hurt Lyanna in some fashion; Rhaegar may have abducted and/or raped Lyanna.
Brandon Stark rides to King's Landing to make Rhaegar answer for his crimes. Rhaegar is not at King's Landing, but Aerys arrests Brandon and his companions (Ethan Glover, Jeffory Mallister, Kyle Royce, and Elbert Arryn), demanding that their fathers come ransom them.
Trial at King's Landing
Aerys commands the execution of Brandon, his companions, and their fathers. Only Brandon's squire Ethan Glover survives.
283
Robb Stark is born to Catelyn Tully at Riverrun.
Battle by The Tower of Joy
Eddard, Martyn Cassel, Theo Wull, Ethan Glover, Mark Ryswell, Howland Reed, and Lord Dustin encounter Oswell Whent, Gerold Hightower, and Arthur Dayne of the Kingsguard by The Tower of Joy; only Eddard and Howland Reed survive the ensuing battle.
Death of Lyanna Stark
Lyanna dies of unknown causes, presumably at The Tower of Joy. Eddard promises her something.
Eddard returns Arthur Dayne's sword to the Daynes of Starfall. Ashara Dayne flings herself into the sea.