Assassination of King Gavilar

Szeth-son-son-Vallano, Truthless and bound by his Oathstone, infiltrates the treaty celebration and kills King Gavilar Kholin on the Parshendi's orders.

Outcome

Gavilar's death sparks the Alethi-Parshendi war and sets in motion the events of the series, including Dalinar's visions and the coalition against Odium.