Spanish conquest · 1519-1521

1521: the fall of Tenochtitlan

How did a few hundred Spaniards bring down the Aztec capital? Students follow the campaign of 1519-1521 and discover that it was won largely by Indigenous armies and by smallpox, and they read the conquest through Nahua eyes.

Teach it live New Open on the map
Length
50 minutes
Ages
12–15
On the map
3 steps, AD 1500 to AD 1521
Live lesson
7 rounds, 3 on the map
Worksheet
Two A4 pages, with Classroom
You need
A projector; phones for live

Live lesson · new in Classroom

Teach it live. The class answers on their phones.

Put the board on the projector. Students join with a six-digit code, no account needed, and tap the map: where was the frontier, where did the grain come from. Their pins drop in together when you reveal, and the closest student takes the round.

€19 per month: every lesson live, every worksheet, cancel anytime. Rome at its height runs live for free.

A live lesson on the projector: the class's pins on the map around Alexandria, the closest students listed beside it A student's phone: the question and a map to tap
7 rounds
3 places to find on the map, quiz questions, a class vote and a one-line answer.
About 15 minutes
Run it as the map step, or to open the discussion. You move on with the space bar.
A report
Every answer, per student and per round, to read back or print after the lesson.
1

Introduction

5 min

Read aloud

How did a few hundred Spaniards bring down the Aztec capital? Students follow the campaign of 1519-1521 and discover that it was won largely by Indigenous armies and by smallpox, and they read the conquest through Nahua eyes.

By the end of the lesson, students can

  • Trace the route of the Spaniards and their allies from the Gulf Coast to Tenochtitlan.
  • Explain the roles of Indigenous allies, smallpox and the lake in the fall of the city.
  • Compare Spanish and Nahua accounts of the siege of 1521.
2

Explore the map

15 min

Project the map, or let students follow on their own devices. Each step opens the map at the right year and place.

a

AD 1500

The route inland

Open the map in 1500 over central Mexico. Trace the route of 1519 from the coast near Veracruz through Cempoala and Tlaxcala to Tenochtitlan. Where are the mountains and passes?

Open this view on the map
b

AD 1500

A siege on the water

Zoom in on the Valley of Mexico. In 1521 the Spaniards launched 13 small warships on Lake Texcoco, built in pieces in Tlaxcala. Why would boats matter in a war over an island city?

Open this view on the map
c

AD 1521

The siege on the map

Jump to 1521, open the Data layers panel and turn on Historical Events. Find the Siege of Tenochtitlan. Then look at the borders: what replaces the Aztec Empire on the map?

Open this view on the map
3

Class discussion

15 min

Pick two or three. They run from what happened to why it mattered.

  1. Cortés arrived with about 500 soldiers, but tens of thousands of Indigenous warriors fought on his side. Why do some historians call it an Indigenous war as much as a Spanish conquest?
  2. In mid-1520 the Spaniards were driven out of Tenochtitlan with heavy losses. Why did they not give up?
  3. Smallpox swept through the city in 1520 and killed the new ruler Cuitláhuac. How did the epidemic change the war?
  4. The siege lasted nearly three months, until 13 August 1521. What made it so long and so deadly?
  5. Nahua writers later recorded the conquest in their own words, for example in the Florentine Codex. Why do these accounts matter?
4

Game round

10 min

Play Rule History as Moctezuma II and reach his last decision in 1520. Afterwards, discuss what came next: Cuitláhuac died of smallpox, and the young ruler Cuauhtémoc defended the city to the end. Could any choice by the Mexica have changed the outcome?

Open Rule History
5

Worksheet

5 min

This worksheet comes with Classroom

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