TransferCredit.org Guide to AP® World History: Modern

Unit 3 covers c. 1450 to c. 1750, when gunpowder helped the Ottoman, Safavid, Mughal and Qing empires conquer vast lands. Focus on how rulers legitimized and consolidated their power (religion, art, buildings, officials, soldiers and taxes) and on how religious change and rivalry shaped these empires.

Key terms, with examples

gunpowder empires

Historians' label for the Ottoman, Safavid and Mughal empires. Like other expanding states after c. 1450, they relied on firearms and cannons to conquer and control large territories.

Example: At Panipat in 1526, Babur's field guns and muskets helped defeat the larger army of the Delhi Sultanate, founding Mughal rule in India.

bureaucratic elites

Officials chosen and trained to serve the ruler, often by merit or exams, rather than holding power through birth or local land. They helped rulers keep centralized control.

Example: Qing emperors staffed their government with scholar-officials who passed civil service exams on Confucian classics, and paired Manchu and Han officials in top posts.

Protestant Reformation

A 1500s movement in Europe that broke with the Roman Catholic Church, rejecting papal authority and many Church practices, and created new Protestant churches.

Example: In 1517, Martin Luther's Ninety-Five Theses attacked the sale of indulgences; printed copies spread his ideas quickly across the German states.

legitimacy

The accepted right to rule. Rulers in 1450–1750 legitimized power through religion, art and buildings, and consolidated it through bureaucracies, paid armies and new taxes.

Example: European kings used divine right and palaces like Versailles; Mughals built grand tombs; the Mexica used sacrifice; the Qing used Confucian exams.

Ottoman Empire

Turkish Sunni Muslim land empire (c. 1300–1922) that expanded across Southern Europe, the Middle East and North Africa, using cannons and janissary troops.

Example: In 1453, Ottoman cannons broke the walls of Constantinople, ending the Byzantine Empire; the city became the Ottoman capital, Istanbul.

military professionals

Full-time soldiers trained, paid and controlled by the ruler rather than by local nobles. Rulers wanting centralized control over people and resources relied on them more after 1450.

Example: Ottoman janissaries were salaried infantry armed with firearms; in Tokugawa Japan, samurai became salaried servants of their lords rather than landholders.

Catholic Reformation

The Catholic Church's response to Protestantism in the 1500s and 1600s: it reformed abuses, restated its teachings and sent missionaries abroad, helping Christianity grow worldwide.

Example: The Jesuits, founded in 1540, ran schools in Europe and sent missionaries to Asia and the Americas; Francis Xavier preached in India and Japan.

methods of imperial expansion

Comparison of how 1450–1750 empires grew and held diverse peoples: gunpowder conquest, armed trade, wars fed by religious and political rivalry, and recruiting conquered peoples into service.

Example: The Ottomans took Constantinople with cannons and recruited Balkan Christians through the devshirme; the Qing conquered China, sharing top posts between Manchu and Han officials.

Safavid Empire

Land empire in Persia, founded in 1501 and centered on present-day Iran, whose rulers made Shi'a Islam the state religion and fought the Sunni Ottomans.

Example: Shah Abbas I (ruled 1588–1629) built a gunpowder army and made Isfahan a grand capital of mosques, gardens and bazaars.

devshirme

The Ottoman levy of Christian boys, mostly from the Balkans, who were converted to Islam and trained as officials or janissary soldiers loyal only to the sultan.

Example: A boy taken from a Serbian village could rise through palace schooling to become a governor or even grand vizier, owing everything to the sultan.

Sunni-Shi'a split

Islam's division over succession after Muhammad: Shi'a Muslims hold leadership belonged to Ali's line; Sunnis accepted the community's caliphs. Ottoman-Safavid rivalry sharpened it.

Example: After 1501 the Safavids made Shi'a Islam compulsory in Persia, while the Sunni Ottomans persecuted Shi'a supporters of the Safavids inside Anatolia.

Mughal Empire

Muslim land empire in South and Central Asia (1526–1857) whose rulers governed a mostly Hindu population, at times through religious tolerance.

Example: Akbar (ruled 1556–1605) abolished the special tax on non-Muslims and brought Hindus into high office, strengthening loyalty across his empire.

What this area covers

How the exam asks it

Questions usually give a source from an empire, such as a court painting, a decree, a tax record or a description of a palace, and ask how it shows a ruler gaining or keeping power, or how it compares with another empire. Sort each method into one of two jobs: convincing people the ruler deserves power, or controlling people and resources. Belief-system questions often ask what caused a religious split or rivalry, or how a religion changed.

Common traps

Trap 1. Mughals are not the Mongols. The Mughal dynasty belongs to this unit; its founder Babur claimed descent from Timur and Chinggis Khan, but the Mongol khanates belong to Unit 2.

Trap 2. Keep land and sea empires apart. This unit's empires grew mainly by conquest over land; the Portuguese and Spanish ocean empires of the same years are Unit 4 material.

Trap 3. Don't treat the Reformation as purely religious. Many northern European rulers backed Protestantism partly to gain Church lands and independence from the pope.

Memory trick

"OSM" from west to east: Ottoman (Turkey and beyond), Safavid (Iran), Mughal (India). Add Qing for China.

Shah, Shi'a: Safavid shahs led the Shi'a state, Ottoman sultans the Sunni one (Mughal Shah Jahan was Sunni).

Unit 4 covers 1450 to 1750, when European ships linked the Eastern and Western Hemispheres for the first time. Focus on why states sponsored voyages, what the Columbian Exchange moved, which labor systems built the new colonial economies, and how societies and states resisted or adapted.

Key terms, with examples

caravel

A small Portuguese ship with lateen sails that could sail against the wind; with new tools and better knowledge of winds and currents, such designs made ocean voyages possible.

Example: Its triangular lateen sail came from Mediterranean and Arab seafaring, its compass from China; the carrack and Dutch fluyt were other new designs.

trading-post empire

Portugal's network of fortified coastal trading posts in Africa and Asia, built on new maritime technology and navigation skills; it aimed to control trade rather than large territories.

Example: After Vasco da Gama reached India by sea in 1498, Portugal seized ports such as Goa (1510) and Malacca (1511).

Columbian Exchange

The exchange of plants, animals and diseases between the Eastern and Western Hemispheres after 1492; Afro-Eurasian diseases devastated Indigenous Americans, while American crops improved Afro-Eurasian diets.

Example: Potatoes, maize and cassava became staples in Europe, Asia and Africa, while Europeans brought wheat, sugar, horses, cattle and pigs to the Americas.

chattel slavery

A new labor system: in the Americas, enslaved Africans and their children became property for life. Africa's traditional slavery, by contrast, often absorbed enslaved people into households.

Example: A 1662 Virginia law made enslavement pass from mother to child; in Africa, older slave trades to the Mediterranean and Indian Ocean continued.

Atlantic trading system

Movement of goods, wealth and labor, including millions of enslaved Africans, linking Europe, Africa and the Americas; taking more men than women, it reshaped West African families and societies.

Example: Ships carried guns and cloth to West Africa, enslaved Africans across the Middle Passage to the Americas, and sugar and tobacco to Europe.

Maroon societies

Communities of people who escaped slavery, often hidden in mountains or forests; a leading example of enslaved people challenging authorities in the Americas through organized resistance.

Example: Palmares, a maroon state of thousands in northeastern Brazil, fought off Portuguese and Dutch attacks for most of the 1600s.

casta system

Spanish America's social hierarchy ranked by ancestry and birthplace: Spanish-born peninsulares at the top, then creoles, mestizos and mulattoes, with Indigenous and African people at the bottom.

Example: Peninsulares held top colonial offices over creoles; similarly, conquest made Manchus a new ruling elite in Qing China after 1644.

global demand for labor

Rising world demand for raw materials and finished goods after 1450, which intensified labor: peasant and artisan work grew, plantations expanded and the Atlantic slave trade intensified.

Example: Indian weavers made more cotton cloth and Chinese households more silk for export, while sugar colonies demanded ever more enslaved Africans.

state-sponsored exploration

Voyages funded by monarchs for wealth, trade routes and power. Spain's backing of Columbus raised European interest in ocean trade; England, France and the Dutch sought northern routes to Asia.

Example: Magellan's Spanish-funded fleet sailed around the world (1519–1522); John Cabot for England and Jacques Cartier for France searched North America for a passage.

plantation economy

Large American estates growing cash crops such as sugar and tobacco with coerced labor, mostly for export to Europe and the Middle East; its growth drove demand for enslaved Africans.

Example: Sugar plantations in Brazil and the Caribbean imported so many enslaved Africans that they outnumbered Europeans in many colonies.

encomienda system

A Spanish grant giving a colonist the right to the labor and tribute of Indigenous people, in return for supposed protection and Christian instruction; abuse was widespread.

Example: Spanish settlers on Hispaniola forced Taino people to work fields and gold mines; the friar Bartolomé de Las Casas condemned the abuses.

mercantilism

Rulers' policy of building state wealth by controlling trade: colonies supplied raw materials and bought finished goods, and the state tried to export more than it imported.

Example: England's 1651 Navigation Act required colonial trade to use English ships, feeding wars with the Dutch; trade rivalry also drove Morocco's 1591 invasion of Songhai.

What this area covers

Key people

How the exam asks it

Sources here are often maps, colonial reports and laws, trade records, paintings and letters from rulers or missionaries. Questions ask what drove exploration, what effect a crop, disease or labor system had, how a writer's position shapes a source, or what stayed the same over the period. Know which labor system belongs to which colony, and keep the Portuguese, Spanish, Dutch, French and British models apart.

Common traps

Trap 1. The Columbian Exchange wasn't only European. Enslaved Africans brought foods such as okra and rice, and mosquitoes spread malaria.

Trap 2. Restricting Europeans isn't the same as closing off trade. Japan and China set limits on their own terms, yet China stayed a huge buyer of American silver.

Memory trick

Iberians first, then the 1600 trio: Portugal and Spain from the 1400s–1500s; the Dutch, English and French from about 1600.

PAD: the Columbian Exchange moved Plants, Animals and Diseases.