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The Aztec capital city of Tenochtitlan, among the largest cities in the world in the early 1500s.

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The Aztec Empire was one of the largest and most powerful empires in the Americas. Beginning in the 1430s, the Aztecs ruled over many native groups in what is now central and southern Mexico. Their empire was made up of city-states, each ruled by its own leader but loyal to the Aztec emperor.

The Aztecs, also called Mexica, had a highly organized society. At the top were nobles, priests, and warriors. At the bottom were farmers, laborers, and enslaved people. The empire was ruled by an emperor, believed to be chosen by the gods. Nobles helped select each new ruler, and conquered city-states were required to pay tribute—gifts such as crops, goods, or labor—to show loyalty to the emperor.

The Aztecs were skilled farmers and engineers. They used advanced irrigation systems and even built floating gardens called chinampas to grow crops on swampy land. These farming innovations produced large amounts of food and helped the Aztec Empire become rich and powerful.

Their capital city, Tenochtitlán, was one of the most impressive cities in the world at the time, with over 300,000 people. Busy markets filled the city with traders and buyers, creating a strong economy.

The Aztecs also valued education. All children—rich or poor, boys or girls—were required to go to school. Boys learned trades, warfare, and leadership, while girls learned household management, cooking, and business skills.

The Aztec Empire continued to grow until the Spanish arrived in 1519. The empire fell in 1521, when the Spanish captured Tenochtitlán, ending one of the most powerful civilizations in the Americas.

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The Inca Empire was the largest empire in the Americas, stretching from what is now northern Ecuador to central Chile. It included more than 12 million people from about 100 different cultural groups. The Inca had a strong and organized government led by an emperor, who was supported by many officials. People paid taxes, often in the form of labor. Men worked part of the year for the government by building roads, farming, or serving in the army.

The Inca created a network of roads and bridges that connected their vast empire. These roads were used by government messengers and officials to send information quickly across long distances. The Inca also developed an efficient system of farming on mountain slopes using terraces and irrigation, allowing them to grow crops like corn, potatoes, and cotton.

Education was mainly for the sons of nobles, who learned about religion, history, and government. Others learned practical skills such as farming, weaving, or herding animals. The Inca worshiped many gods, including those of the sun, earth, and mountains, and believed that nature held spiritual power.

The Inca economy was based on barter, or the exchange of goods and services. Their most famous city, Machu Picchu, showed their skill in stone building and architecture. The empire came to an end in 1533, when the Spanish, led by Francisco Pizarro, conquered the Inca and captured their emperor.

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The civilizations of Ancient Egypt and Kush developed along the Nile River in Northeast Africa. The Nile flooded each year in a predictable pattern, leaving behind rich, fertile soil that made the land perfect for farming. Because of this, people were able to grow crops, raise animals, and build strong communities. The river also acted as a natural highway, allowing boats to travel up and down to trade goods and ideas.

Egypt grew powerful under its pharaohs, who ruled for more than 3,000 years. These rulers organized a strong government with many officials to collect taxes, manage farmland, and oversee building projects. People had specific roles in society — farmers, builders, soldiers, and craft workers all helped the empire succeed. Education was reserved mostly for the sons of nobles, while other children learned practical skills at home to prepare for work and family life.

At the southern end of the Nile, the Kingdom of Kush developed. Kush was deeply influenced by Egypt but also became a major trading power on its own. Its location allowed it to control trade routes that connected central Africa and Egypt, bringing wealth from goods such as gold, ivory, and grain. For a time, Kush grew so strong that it ruled over Egypt as well — from about 745 BCE to 664 BCE, both lands were united under Kushite pharaohs.

Like Egypt, the Kushites worshiped many gods and built temples and monuments to honor them. Both civilizations made important advances in math, science, and astronomy. Egyptians used geometry to design the pyramids and developed a 365-day calendar to track the flooding of the Nile. Later in history, North Africans expanded into parts of Europe, spreading new ideas in science, mathematics, and navigation. This shows that expansion was not only about power and land, but also about sharing knowledge and culture across regions.

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Empires in West Africa (700s CE – 1600s CE)

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Empires in West Africa (700s CE – 1600s CE)

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Beginning around the 700s CE, several powerful empires rose along the Niger River in West Africa, just south of the Sahara Desert. The region had good soil for farming, but it was trade that made these empires rich and strong. The Niger River allowed people to travel and exchange goods such as gold, salt, ivory, and iron, connecting West Africa with North Africa and beyond. Controlling these trade routes helped empires grow in both wealth and influence.

The first of these great empires was Ancient Ghana. Ghana became wealthy by trading gold and iron for salt, cloth, and books from northern merchants. The king of Ghana taxed traders as they passed through, using the money to build a powerful army and protect his lands. Ghana became one of the most advanced societies of its time, with busy markets, skilled workers, and strong leadership.

By the 1200s, Ghana’s power declined, and a new empire rose — the Kingdom of Mali. Mali became even larger and wealthier, controlling important trade cities like Timbuktu and Gao. Its most famous ruler was Mansa Musa, who ruled from 1312 to 1337 CE. He was known for his great wealth, his support for education, and his encouragement of art and architecture. Mansa Musa built mosques and schools, and he invited scholars from across Africa and the Middle East to teach in Mali. Under his rule, Timbuktu became one of the most important centers of learning in the world.

After Mansa Musa’s death, Mali weakened, and another empire rose to power — the Songhai Empire. Songhai grew to become the largest empire in African history, controlling trade along the Niger River and parts of the Sahara. Songhai rulers maintained order with a strong army and navy, and the empire continued to thrive from its control of gold and salt trade. Eventually, internal fighting and an invasion from Morocco in the late 1500s caused Songhai to fall.

Even after these empires ended, their influence remained. The art, languages, and traditions from these civilizations continue to shape Africa’s culture today. Modern African nations still celebrate their rich history of trade, knowledge, and innovation — a reminder that expansion can build both power and connection across the world.

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A Time of Change and Exploration (1200s – 1500s CE)

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A Time of Change and Exploration (1200s – 1500s CE)

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During the Middle Ages, most Europeans lived quiet lives and rarely traveled far from home. Toward the end of this period, people began taking long trips called pilgrimages—religious journeys to visit Christian holy sites in far-off places, including parts of the Middle East, which were also sacred to Jews and Muslims.
These travels exposed Europeans to new lands and goods, such as silk, spices, and jewels. The contact with distant regions made many Europeans curious about the wider world and eager to trade for valuable products.

A new class of people called merchants began to grow. They made their living by buying and selling goods and became very successful in Italian port cities like Venice, where ships brought goods from Asia. Some Italians even traveled to Asia themselves. The explorer Marco Polo journeyed all the way to China with his family and met the great ruler Kublai Khan. When he returned to Italy, Marco Polo wrote about the wonders he had seen, inspiring others to dream about exploration and trade.

One person who helped turn that curiosity into action was Prince Henry of Portugal. In the early 1400s, he sent sailors to explore the west coast of Africa in search of gold and new trade routes. Portuguese sailors returned with gold and goods—and also began bringing back enslaved Africans, starting Portugal’s involvement in the slave trade, which would continue for centuries.

Portugal kept exploring farther east, establishing trading posts in Asia. Portuguese explorers reached China in the early 1500s and traded in cities like Macau, and later even landed in Japan. There, Europeans introduced new animals, goods, and technologies—but also spread the practice of slavery.

Trade between Europe and Asia often moved along a route known as the Silk Road, named for the fine silk cloth traded from China. Goods from Asia had to pass through the Middle East to reach Europe. In 1453, the Ottoman Turks captured Constantinople (today Istanbul), cutting off many of Europe’s trade routes. This caused European leaders to look for new paths to Asia that avoided the Middle East.

Thanks to advances in navigation and shipbuilding, European countries like Portugal and Spain began sponsoring long voyages of exploration. Their goal was to find faster trade routes, gain wealth, and expand their power across the world.

As Spain and Portugal expanded their empires, religion also played a major role. Spanish explorers believed they were spreading Christianity to new lands. But sometimes their actions were harsh and unfair. One example was a law called the Requirement of 1513, which forced Native peoples to accept Spanish rule or face punishment. We’ll look more closely at that document later.

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The Rise and Fall of the Inca Empire – Gordon McEwan (TED-Ed)

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The Rise and Fall of the Inca Empire – Gordon McEwan (TED-Ed)

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Watch how the Inca grew powerful across the Andes Mountains.
As you watch, notice what they built, how they ruled, and what led to their downfall.
Think: Which parts match what we read?

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The rise and fall of the Inca Empire - Gordon McEwan

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African Kingdoms: Ghana, Mali, and Songhai

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African Kingdoms: Ghana, Mali, and Songhai

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Watch how powerful kingdoms rose along the Niger River in West Africa.
Pay attention to how trade, geography, and leadership helped each empire grow rich and strong.
Think: What made these kingdoms powerful, and what caused them to change over time?

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Africa Geography & Medieval Ghana, Mali, and Songhai Activity - History by Instructomania

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World History: The Age of Discovery in 5 Minutes

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World History: The Age of Discovery in 5 Minutes

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Take 5 minutes to travel with early European explorers.
Notice why they sailed, where they went, and what they hoped to find.
Think: Which motives for expansion match what we read in the Europe post?

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World History The Age of Discovery in 5 Minutes

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Members of the Xochitl-Quetzal Danza Azteca group in traditional colorful
Aztec clothing.

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Look at the Details Think about what you have learned in previous lessons

about diﬀerent Native American cultures. Examine the image of

performers from the Chicago dance group Xochitl-Quetzal Danza Azteca

or Xochitl-Quetzal Aztec Dance. Why are the children dressed the way

they are? Why do you think they would want to learn and perform

traditional Aztec dances?

Share your ideas with a partner or group. What questions do you have

about Aztec peoples today and their eﬀorts to keep their culture alive?