o Overview -> Conquest and expansion -> Imperial state building -> Fragmentation and decline o Conquest and expansion -> Pastoral nomadism sustained skilled mounted archers. -> Chinggis Khan united Mongol tribes in 1206. -> Loyalty and military merit weakened rival clan power. -> Mobile cavalry and coordinated tactics enabled conquest. -> Captured engineers supplied siege skills against cities. -> Conquests linked China, Central Asia, Persia, and Russia. o Imperial state building -> Mongols used local officials to tax settled populations. -> Religious tolerance helped govern diverse conquered peoples. -> Kublai Khan founded Yuan rule and defeated Song in 1279. -> Yuan retained Chinese administration but favored Mongols. -> Ilkhans ruled Persia; some adopted Islam for legitimacy. -> Golden Horde collected tribute through Russian princes. o Fragmentation and decline -> Succession disputes fractured unified rule into khanates. -> Yuan, Ilkhanate, Chagatai, and Golden Horde ruled regions. -> Inter-khanate wars weakened wider imperial coordination. -> Yuan fiscal strain and disasters fueled peasant rebellion. -> Ming forces expelled Yuan from China in 1368. o Overview -> Trade and communication -> Cultural and environmental effects -> Continuity and change o Trade and communication -> Mongol conquests joined Eurasian lands under related states. -> Pax Mongolica: protection made overland travel safer. -> Safer routes lowered risks, encouraging Silk Roads trade. -> Merchant privileges and credit supported caravan commerce. -> Yam relay stations sped imperial orders and diplomatic news. -> Paiza passes granted authorized travelers access to supplies. o Cultural and environmental effects -> Mongol courts moved artisans, often forcibly, across Eurasia. -> Relocated experts shared medicine and astronomical knowledge. -> Contacts helped Chinese gunpowder knowledge spread westward. -> Travelers such as Marco Polo widened knowledge of Asia. -> Trade and troop movements helped plague spread in the 1300s. -> Black Death mortality disrupted labor, markets, and revenues. o Continuity and change -> Mongols expanded Silk Roads that predated their conquests. -> Silk and luxury trade persisted; imperial protection grew. -> Conquest destroyed cities even as rulers later aided commerce. -> Local religions endured despite conquest and elite migration. -> Khanate wars reduced security; Eurasian exchange continued.