OSAT World HistoryGeography (118)

The Eastern Roman (Byzantine) Empire preserved Roman traditions while developing distinct characteristics. Constantinople's strategic location controlled trade between Europe and Asia. The empire endured Germanic invasions that destroyed the west and continued until Ottoman conquest in 1453 CE.

Justinian I (r. 527–565 CE) attempted to reconquer the western Mediterranean, temporarily recovering North Africa, Italy, and southern Spain. His legal codification (Corpus Juris Civilis) systematized Roman law and influenced European legal development. Justinian built Hagia Sophia, an architectural masterpiece. His reign also witnessed the devastating Justinian Plague (541–542 CE), which killed millions and weakened the empire.

Byzantine culture synthesized Roman administration, Greek language and learning, and Orthodox Christianity. Theological controversies (Arianism, Iconoclasm) intertwined with politics. The Iconoclast Controversy (726–843 CE) over religious images divided the empire. The Great Schism (1054 CE) formalized the split between Roman Catholic and Eastern Orthodox Christianity, differing over papal authority, the filioque clause (whether the Holy Spirit proceeds from the Father alone or from Father and Son), liturgical practices, and clerical celibacy.

Byzantium transmitted classical Greek learning, serving as a bridge between antiquity and later Western recovery of ancient texts. Byzantine missionaries Cyril and Methodius created the Cyrillic alphabet and converted Slavic peoples to Orthodox Christianity. Byzantine influence shaped Russian, Serbian, Bulgarian, and other Orthodox cultures.

Key exam concepts: Byzantine continuity with and divergence from Rome; Justinian's achievements; Orthodox Christianity and the Great Schism; Byzantine cultural transmission to Russia and Europe.

Islam emerged in seventh-century Arabia. Muhammad (c. 570–632 CE), a merchant from Mecca, received revelations (recorded in the Quran) and founded a religious community (umma). Facing Meccan opposition, Muhammad and followers migrated to Medina in 622 CE (hijra)—the starting point of the Islamic calendar. Muhammad unified Arabia before his death in 632 CE.

Islam's Five Pillars include shahada (profession of faith: "There is no god but God, and Muhammad is His messenger"), salat (five daily prayers), zakat (almsgiving), sawm (fasting during Ramadan), and hajj (pilgrimage to Mecca). The Quran, believed to be God's direct revelation, serves as Islam's primary source alongside hadith (sayings and actions of Muhammad) and sunnah (prophetic practice). Sharia (Islamic law) governs religious, social, and personal matters.

The Rashidun Caliphs (632–661 CE)—Abu Bakr, Umar, Uthman, and Ali—expanded the Islamic state through the Levant, Persia, Egypt, and North Africa. Succession disputes following Ali's assassination produced the Sunni-Shia split. Sunnis accepted Umayyad succession; Shias believed leadership belonged to Ali's descendants (imams).

The Umayyad Caliphate (661–750 CE) established Damascus as its capital, expanded to Spain and Central Asia, and Arabized administration. Non-Arab Muslim converts (mawali) faced discrimination, contributing to Abbasid revolution.

The Abbasid Caliphate (750–1258 CE) moved the capital to Baghdad, which became a magnificent cultural center. The Abbasids incorporated Persian administrative traditions and promoted scholarship. The House of Wisdom (Bayt al-Hikma) translated Greek, Persian, and Indian works into Arabic, preserving and advancing classical knowledge. The Islamic Golden Age (c. 750–1258 CE) produced advances in mathematics (algebra, algorithms), astronomy, medicine (Ibn Sina/Avicenna, al-Razi), optics (Ibn al-Haytham), chemistry, philosophy (al-Farabi, Ibn Rushd/Averroes), geography, and literature.

Islamic civilization spread through conquest, trade, and conversion. Spain (al-Andalus) developed a flourishing Islamic culture. Islam spread through trans-Saharan trade to West Africa, through Indian Ocean trade to East Africa and Southeast Asia, and through Central Asian trade to Turkic peoples. Sufi orders (mystical brotherhoods) played significant roles in conversion, emphasizing personal spiritual experience and adapting to local customs.

Political fragmentation characterized later Islamic history. The Abbasid caliphate weakened as regional dynasties (Fatimids in Egypt, Umayyads in Spain, various Turkic rulers) gained independence. Mongol conquest destroyed Baghdad in 1258 CE, ending the Abbasid caliphate, though a nominal Abbasid line continued in Cairo.

Key exam concepts: Muhammad's life and Islam's origins; Five Pillars; Sunni-Shia split causes and consequences; Umayyad and Abbasid characteristics; Islamic Golden Age contributions; mechanisms of Islamic spread.

Western Europe after Rome experienced political fragmentation, economic contraction, and cultural transformation. Germanic kingdoms (Franks, Visigoths, Ostrogoths, Lombards, Anglo-Saxons) established successor states. The Catholic Church preserved literacy, provided social services, and maintained connections across political boundaries.

The Frankish kingdom emerged as the most powerful Germanic state. The Merovingian dynasty gave way to the Carolingians. Charlemagne (r. 768–814 CE) conquered much of Western Europe and was crowned Roman Emperor by Pope Leo III in 800 CE—establishing the precedent of papal coronation and the concept of a revived Western Roman Empire (later the Holy Roman Empire). The Carolingian Renaissance promoted education, standardized script (Carolingian minuscule), and preserved classical texts. Charlemagne's empire divided among grandsons in 843 CE (Treaty of Verdun), foreshadowing France, Germany, and intermediate territories.

The ninth and tenth centuries brought renewed invasions: Vikings from Scandinavia, Magyars from Central Asia, and Muslims from the Mediterranean. Political authority devolved to local lords capable of providing protection, contributing to feudalism's development.

Feudalism structured medieval political relationships. Lords granted fiefs (usually land) to vassals in exchange for military service and loyalty. Vassals owed specific obligations including military service (usually forty days annually), counsel, and financial payments. The ceremony of homage formalized these relationships. Manorialism organized economic life around the manor, with serfs bound to the land, owing labor and a portion of produce to their lord in exchange for protection and access to land. The three-field system improved agricultural productivity.

The High Middle Ages (c. 1000–1300 CE) witnessed agricultural improvement (heavy plow, horse collar, three-field rotation), population growth, urban revival, and commercial expansion. Towns gained charters granting self-governance. Guilds regulated craft production and trained apprentices. Banking developed in Italian city-states, and trade fairs facilitated long-distance commerce.

The Catholic Church dominated medieval life. The papacy reached its height under Innocent III (r. 1198–1216 CE). The Investiture Controversy (1076–1122 CE) between Pope Gregory VII and Emperor Henry IV contested control over clerical appointments. The Concordat of Worms (1122 CE) compromised: the pope would invest bishops with spiritual authority, the emperor with temporal authority. Monasticism reformed through movements including Cluniac (910 CE) and Cistercian (1098 CE) orders. Mendicant orders (Franciscans, Dominicans) emerged in the thirteenth century, emphasizing poverty and preaching.

Scholasticism synthesized Christian theology with Aristotelian philosophy. Thomas Aquinas (1225–1274 CE) argued that faith and reason complemented each other. Universities emerged at Bologna (law), Paris (theology), and Oxford, creating institutional structures for higher education.

The Crusades (1095–1291 CE) represented military campaigns to recover the Holy Land from Muslim control. Pope Urban II called the First Crusade in 1095 CE, and Crusaders captured Jerusalem in 1099 CE, establishing Crusader states. Subsequent Crusades achieved mixed results; Saladin recovered Jerusalem in 1187 CE. The Crusades increased East-West trade, exposed Europeans to Islamic culture and technology, strengthened papal authority initially but weakened it through failures, and intensified religious hostility and violence against Jews and Muslims.

Key exam concepts: Germanic successor kingdoms; Charlemagne's empire and Carolingian Renaissance; feudalism and manorialism; High Medieval economic and urban growth; medieval Church power and reform; Crusades' causes and consequences.

The fourteenth century brought devastating crises. The Great Famine (1315–1322 CE) resulted from climate deterioration and overpopulation. The Black Death (1347–1351 CE) killed approximately one-third of Europe's population. Plague recurred periodically for centuries. Demographic collapse disrupted feudal economics: labor scarcity increased peasant bargaining power, contributing to serfdom's decline in Western Europe and peasant revolts (Jacquerie in France, Peasants' Revolt in England).

The Hundred Years' War (1337–1453 CE) between England and France devastated French territory, developed national consciousness, demonstrated the superiority of infantry (English longbow) over cavalry, and concluded with French victory aided by Joan of Arc. Political centralization advanced in England and France.

The Church experienced crisis. The Avignon Papacy (1309–1377 CE) moved the papacy to France under French royal influence. The Great Schism (1378–1417 CE) produced rival popes in Rome and Avignon (and briefly a third in Pisa), damaging papal prestige. The Conciliar Movement attempted to establish church councils' superiority over popes but ultimately failed. Reformers including John Wycliffe (England) and Jan Hus (Bohemia) criticized Church corruption and teachings, foreshadowing the Protestant Reformation.

Key exam concepts: Causes and consequences of fourteenth-century crises; Black Death's demographic, economic, and social effects; Hundred Years' War developments; Church crises and reform movements.

After Han collapse (220 CE), China fragmented into the Three Kingdoms and subsequent dynasties. Buddhism flourished during this period of political disunity, offering salvation doctrines appealing during troubled times.

The Sui Dynasty (581–618 CE) reunified China. Emperor Sui Yangdi constructed the Grand Canal linking the Yellow and Yangtze Rivers, facilitating economic integration but exhausting resources and provoking rebellion.

The Tang Dynasty (618–907 CE) represented a Chinese golden age. Tang China controlled Central Asia (Silk Road), Korea (tribute relationship), and influenced Japan and Vietnam. The capital Chang'an was the world's largest city, cosmopolitan and culturally sophisticated. Tang achievements included poetry (Li Bai, Du Fu, Wang Wei), ceramics, painting, and printing (woodblock). Buddhism reached its peak before Tang persecution (845 CE). The examination system expanded, recruiting officials through merit-based testing. Tang decline resulted from An Lushan Rebellion (755–763 CE), regional military governors' power, and eunuch influence.

The Song Dynasty (960–1279 CE) reunified most of China but faced military pressure from northern peoples (Khitan Liao, Jurchen Jin, Mongols). The Southern Song (1127–1279 CE) retreated south after losing northern China to the Jin. Despite territorial losses, Song China achieved remarkable economic and technological advancement. Innovations included movable-type printing (Bi Sheng), gunpowder weapons, the magnetic compass, improved shipbuilding, and paper currency. Agricultural improvements (Champa rice from Vietnam, new tools) increased food production. Commerce expanded dramatically with urbanization, specialized production, and sophisticated banking.

Neo-Confucianism, synthesized by Zhu Xi (1130–1200 CE), combined Confucian ethics with Buddhist and Daoist metaphysical elements, emphasizing self-cultivation and investigation of things. Neo-Confucianism became orthodox state ideology through the Yuan, Ming, and Qing dynasties.

Japan developed distinctive civilization influenced by China. The Yamato clan unified Japan by the sixth century CE. Prince Shotoku (574–622 CE) promoted Buddhism and Chinese-style government. The Nara period (710–794 CE) saw extensive Chinese borrowing in writing, Buddhism, Confucianism, and government organization. The Heian period (794–1185 CE) witnessed cultural refinement and Japanese adaptations, including kana syllabary script, The Tale of Genji (Murasaki Shikibu), and distinctive artistic styles.

Political power shifted from the emperor to the Fujiwara regents and subsequently to warrior clans. The Kamakura period (1185–1333 CE) established the shogunate, with the shogun (military ruler) holding effective power while emperors retained ceremonial authority. Samurai warriors followed bushido (warrior code) emphasizing loyalty, martial skill, and honor. Zen Buddhism spread among samurai. Mongol invasion attempts (1274, 1281 CE) failed, aided by typhoons (kamikaze, "divine wind").

The Muromachi period (1336–1573 CE) saw continued military rule with increasing decentralization during the Sengoku (Warring States) era. Cultural developments included Noh drama, tea ceremony refinement, and ink painting.

Korea developed under Chinese influence while maintaining distinct identity. The Silla kingdom unified the peninsula (668–935 CE), followed by the Koryo dynasty (918–1392 CE), which developed celadon ceramics and adopted Buddhism and Chinese governmental models.

Vietnam (Dai Viet) gained independence from China in 939 CE and developed distinctive culture while absorbing Chinese elements (Confucianism, writing, government). Vietnamese resistance to Chinese reassertion continued throughout the medieval period.

Key exam concepts: Sui-Tang-Song dynastic achievements; Chinese technological innovations; Neo-Confucianism; Japanese cultural development and political structures; Korea and Vietnam's relationship to Chinese civilization.

The Mongols under Chinggis (Genghis) Khan (r. 1206–1227 CE) created the largest contiguous land empire in history. Chinggis Khan unified Mongol tribes, developed decimal military organization, promoted meritocracy, and codified law (yasa). Mongol military effectiveness derived from cavalry mobility, composite bows, psychological warfare, and adoption of conquered peoples' technologies.

Mongol conquests devastated Central Asia, Persia, Russia, and China. The Jin dynasty fell in 1234 CE; the Song in 1279 CE. The Mongols reached Eastern Europe (1240s), destroying Kiev and defeating Polish and Hungarian armies, before withdrawing. Mongol sieges destroyed Baghdad (1258 CE), ending the Abbasid caliphate.

The empire divided into four khanates: the Yuan dynasty (China, Mongolia), Chagatai Khanate (Central Asia), Ilkhanate (Persia, Middle East), and Golden Horde (Russia, Eastern Europe). The Pax Mongolica (Mongol Peace) facilitated unprecedented Eurasian connectivity. Merchants (including Marco Polo) traveled the Silk Roads safely. Technologies, ideas, and diseases circulated. The Black Death likely originated in Central Asia, spreading westward along Mongol-secured trade routes.

Mongol rule varied by region. In China, Kublai Khan established the Yuan dynasty (1271–1368 CE), employing foreigners over Chinese scholars in administration. In Persia, the Ilkhanate converted to Islam (1295 CE). In Russia, the Golden Horde dominated for over two centuries, collecting tribute and influencing Russian political development toward autocracy.

Mongol decline resulted from succession disputes, assimilation to conquered cultures, and resistance movements. The Ming dynasty expelled the Yuan from China (1368 CE). Timur (Tamerlane, r. 1370–1405 CE) established a successor empire based in Samarkand, conquering Persia, northern India, and the Middle East with notorious brutality.

Key exam concepts: Chinggis Khan's achievements and Mongol military advantages; extent of Mongol conquests; Pax Mongolica and its consequences; effects of Mongol rule on different regions.

Sub-Saharan Africa developed diverse civilizations often connected to trans-Saharan and Indian Ocean trade.

West African kingdoms emerged along trans-Saharan trade routes. Ghana (c. 300–1200 CE) controlled gold and salt trade, taxing merchants passing through its territory. Mali (c. 1235–1600 CE), founded by Sundiata Keita, expanded under Mansa Musa (r. 1312–1337 CE), whose pilgrimage to Mecca (1324 CE) distributed so much gold that he depressed gold prices in Cairo. Timbuktu became a center of Islamic scholarship. Songhai (c. 1464–1591 CE) under Sunni Ali and Askia Muhammad controlled the largest West African empire before Moroccan invasion.

East African city-states (Mogadishu, Mombasa, Kilwa, Zanzibar) developed along the Indian Ocean coast, trading gold, ivory, and slaves for manufactured goods from Arabia, India, and China. Swahili culture blended Bantu and Arab elements, with Swahili language incorporating Arabic vocabulary. Islam spread through merchant communities.

Great Zimbabwe (c. 1100–1450 CE) in southern Africa built impressive stone structures and controlled gold trade to the coast. Its decline preceded Portuguese arrival.

Ethiopian Christianity developed distinctively from the fourth century CE onwards, maintaining independence and connections to the broader Christian world. Ethiopia's Zagwe and Solomonic dynasties built rock-hewn churches at Lalibela and preserved Christian traditions.

Key exam concepts: Trans-Saharan trade and West African kingdoms; Mansa Musa's significance; East African city-states and Indian Ocean trade; Great Zimbabwe; Ethiopian Christianity.

The Americas developed civilizations independently of Afro-Eurasian contact. Mesoamerica and the Andes represented primary centers of urbanization and state development.

The Maya civilization (c. 250–900 CE Classic period) flourished in the Yucatan Peninsula, Guatemala, and Belize. Maya achievements included sophisticated writing (the most developed in the Americas), astronomical observations, the Long Count calendar, monumental architecture (temple-pyramids), and advanced mathematics including the concept of zero. Maya society organized into competing city-states (Tikal, Calakmul, Palenque, Copan). Classic Maya civilization collapsed in the ninth century, possibly due to environmental degradation, warfare, or drought, though Maya populations persisted.

The Aztec (Mexica) Empire (1428–1521 CE) dominated central Mexico from its island capital Tenochtitlan (modern Mexico City). The Aztec tribute empire extracted resources from conquered peoples. Aztec religion emphasized human sacrifice to sustain the sun, with captive warriors as primary victims. The calpulli (clan-based community) organized social and economic life. Aztec society was hierarchical, with nobles, commoners, serfs, and slaves. Tenochtitlan's population exceeded 200,000, making it one of the world's largest cities.

The Inca Empire (1438–1533 CE) controlled the Andean region from Ecuador to Chile. The Inca developed an extensive road system, sophisticated textile production, terraced agriculture, and administrative efficiency without writing (using quipu knotted strings for record-keeping). Mit'a (labor tax) mobilized populations for public works. The Inca practiced mummification and ancestor worship. Inca society centered on the divine emperor (Sapa Inca), with communal land ownership at the village level.

North American societies varied from sedentary agricultural communities (Ancestral Puebloans, Mississippian culture with its capital at Cahokia) to nomadic hunter-gatherers. Cahokia (near modern St. Louis) peaked around 1100 CE with a population of approximately 20,000 and monumental earthen mounds.

Key exam concepts: Maya achievements and Classic period collapse; Aztec social organization and religion; Inca administrative systems; diversity of North American societies.