Reign of Emperor Lizong of Southern Song (1240s)

Timeline

1. 1241–1246Huai River front · ChinaIn 1241 Mongol Great Khan Ögedei died; the princes returned to the steppe to contest the khaganate, temporarily halting large-scale offensives against Southern Song. Lizong's court gained breathing room, with generals like Meng Gong repairing border defenses and fortresses, and the Huai River–Yangtze defensive line relatively stable by the mid-1240s.
2. 1240–1249Lin'an · ZhejiangAfter Shi Miyuan's death, Ding Daquan, Jia Sidao and others successively monopolized power; court government was corrupt while Neo-Confucian scholarship flourished. To sustain massive military and palace expenditures, the court continued issuing huizi notes and raising taxes, accumulating social and economic tensions; Jiangnan remained wealthy but the state could no longer match the Mongols in a long war.
3. 1240–1249Xiangyang–Jianghuai defensive line · ChinaAfter allying with the Mongols to destroy Jin in 1234, Southern Song gained nothing and instead suffered a Mongol counterattack that same year. In 1240 Lizong's court strengthened defenses at Xiangyang, Luzhou, Hefei and elsewhere, but had lost its northern shield and was strategically passive. This decade was Southern Song's last relatively peaceful period before its fall.