Northern Han
The Conquest of Northern Han by Song () occurred in 979, when the forces of the Song Dynasty captured the Northern Han capital of Taiyuan in present-day Shanxi Province after a two-month siege. A relief attempt by the forces of the Liao Dynasty, which was allied to Northern Han, was easily defeated by the Song. Yelü Dilie, a cousin of Emperor Jingzong of Liao, was killed along Yelü Sha's son Yelü Deli ().