14 events the sources record for this year, grouped by region.
What happened
China (12)
Li Jiqian of Western Xia betrayed Song and surrendered to Liao; he was made military governor of Dingnan. (History of Liao (Liaoshi) 遼史 卷11 統和4年 2月)
Song invaded along three routes: Cao Bin, Mi Xin, Tian Chongjin and Pan Mei took Qigou, Zhuozhou, Gu'an and Xincheng all. (History of Liao (Liaoshi) 遼史 卷11 統和4年 3月)
At Qigou Pass Cao Bin and Mi Xin were crushed and pursued as far as the Juma River. (History of Liao (Liaoshi) 遼史 卷11 統和4年 5月)
Xiezhen recovered Shuozhou and captured the Song general Yang Jiye. (History of Liao (Liaoshi) 遼史 卷11 統和4年 7月)
Shengzong personally defeated the Song generals Liu Tingrang and Li Jingyuan at Mozhou. (History of Liao (Liaoshi) 遼史 卷11 統和4年 12月)
He took Shenzhou; because it did not surrender at once, he killed its chief and below and plundered on a large scale. (History of Liao (Liaoshi) 遼史 卷11 統和4年 12月)
In the third month, Cao Bin fought the Khitan army south of Gu'an and took the city. (History of Song (Songshi), Annals 宋史卷005 雍熙三年)
Cao Bin's army suffered a great defeat at Qigou Pass, crossed the Juma River and stationed at Yizhou; Liu Baoxun was killed in action. (History of Song (Songshi), Annals 宋史卷005 雍熙三年)
Tian Chongjin of Dingzhou entered Khitan territory, attacked Qigou Pass and took it. (History of Song (Songshi), Annals 宋史卷005 雍熙三年)
Emperor Kazan secretly left the palace by night and took Buddhist vows at Kazan-ji, aged 19. (Hyakurenshō 第四·華山天皇·寬和二年 ○廿二日)
West Asia (1)
An earthquake brings down houses and churches and damages part of the dome of the great church. The emperor spends 10 kentenaria of gold on its rebuilding (Skylitzes–Kedrenos, Synopsis of Histories Bonn Cedrenus II p.438 (part_13 L43-47))