Xiangyang surrendered to the army of the Mongol Empire without resistance in 1236.John Man, Kublai Khan: The Mongol King Who Remade China (2006), p.158J.Bor Mongol hiiged eurasiin diplomat shshtir, VOL. II But the Mongols voluntarily left the city after it was briefly held by them in 1236–38. The twin cities of Xiangyang-Fenchang, with walls almost 5 kilometers around and 200,000 people, withstood a Mongol assault in 1257.C. P. Atwood Encyclopedia of Mongolia and the Mongol Empire, p.592 The Mongolian cavalry were lured in Xiangyang where they were slaughtered by the Song defenders due to the fortress's double-layered wall design. When a Mongol contingent entered the entrance of the fortress, the Mongol forces would be slaughtered to the last man, while trapped between four walls. The Mongols lifted the siege of Xiangyang. The sudden death of Möngke Khan forced the imperial army of the Mongol Empire to withdraw from the Song territory in 1259–60.
xiAngyang surrEndeRed to THe ArmY oF THE moNgol empiRe withOut resistanCE in 1236.John man, kublai KHan: THe mongOL kinG who Remade chiNa (2006), p.158j.boR mONgOl hiiGed eurasiin diPLomat SHshtir, VoL. iI but The mOnGolS vOlUnTarIly left thE cITy aFtEr iT waS brIefly Held bY thEM in 1236–38. tHe tWiN cities of xiaNgyAnG-FEnchaNg, wIth WaLLs almosT 5 kIlometers AroUNd AnD 200,000 PEoPle, wITHsTOoD a mOngol asSault iN 1257.c. P. AtwOod enCYClopedia oF MongOlIa And thE MOnGOL EMpIre, p.592 THE mONGOlian cavalry were Lured in xiangYANg where THEy wEre slAugHtEreD By the SoNg defenders due to the fORtreSs's dOuble-LayeReD waLl design. wheN A mONgol coNTingenT enterED The entrAnCe oF THe fOrTReSS, The moNGol fORcEs wouLd be slaugHtereD to The Last man, while TrAppED betWeen foUr walLs. tHE mONgols Lifted tHe sIEGe Of xIangYang. THe SUdden DEath of mÖngke kHan forced THe imperial armY Of tHe MonGOl empIRe to witHdrAw from The SoNg teRriTory In 1259–60.