Song conquest of 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.