Paper 1: Prescribed subject 2 — Conquest and its impact: The conquest of Mexico and Peru, 1519–1551

· Exact syllabus anchor: Paper 1, Prescribed subject 2: Conquest and its impact, Case study 2: The conquest of Mexico and Peru (1519–1551).
· Official IB focus: Spanish conquest in Latin America, especially political and economic motives, religious arguments for conquest, campaigns against the Aztec Empire and Incas, alliances with indigenous populations, named actors, and social, economic, demographic and cultural impact.
· Main exam expectation: students must use both prescribed case studies in this Paper 1 prescribed subject across the course, but this cheat sheet focuses only on Mexico and Peru. For this subtopic, students should be ready to analyse causes, methods, key actors and impacts, not narrate conquest as inevitable.
· Named syllabus examples to know: Hernán Cortés, Francisco Pizarro, Diego de Almagro, Malinche, Atahualpa, Moctezuma II, Bartolomé de las Casas, Juan Ginés Sepúlveda, encomienda, Mita, spread of disease, religion, language, trade, and alliances with indigenous populations.
· Comparison requirement: comparison is useful because the syllabus pairs Mexico and Peru. Strong answers compare Spanish motives, alliances, leadership, indigenous political weaknesses, and short- and long-term impacts.

The central historical problem: why did small Spanish forces defeat large empires?

· The IB is not asking for a heroic conquistador story. It expects analysis of how Spanish motives, religious justification, indigenous alliances, imperial instability, disease, and systems of exploitation combined.
· A strong judgement avoids “guns, germs and steel only”. Technology and disease mattered, but Spanish success also depended on local allies, political divisions, and the ability of conquistadors to exploit existing tensions within the Aztec and Inca worlds.
· The impact question is equally important: conquest created new colonial labour systems, redirected trade and wealth, caused demographic collapse, and transformed religion and language.

Motives for exploration and conquest: political, economic and religious

· Political motives: Spanish expansion aimed to extend royal authority, prestige and imperial control in the Americas. Use this to argue that conquest was not only private adventurism; it also strengthened the Spanish Crown’s claim to overseas empire.
· Economic motives: conquistadors sought gold, silver, land, labour and access to colonial trade. This explains the intensity of campaigns and the later creation of coercive labour systems such as the encomienda and Mita.
· Religious arguments for conquest: conquest was justified through Christian conversion and the claim that Spanish rule would bring indigenous peoples into the Catholic faith. Use this as an argument about ideology: religion legitimised conquest but also became a tool of cultural control.
· Evaluation point: economic motives often drove conquest in practice, while religious arguments helped make conquest morally and legally defensible to Spanish authorities.

Mexico: Cortés, Moctezuma II and the campaign against the Aztec Empire

· Hernán Cortés led the campaign against the Aztec Empire from 1519; exam answers should focus on his use of diplomacy, coercion and alliance-building rather than simply military strength.
· Moctezuma II is useful for analysing leadership and miscalculation. His dealings with Cortés can support arguments about the difficulty of responding to an unfamiliar threat within a politically pressured empire.
· Alliances with indigenous populations were central. Groups hostile to Aztec dominance, especially those resentful of tribute demands, gave Cortés manpower, intelligence and local legitimacy.
· Malinche is a key actor because she demonstrates that conquest depended on communication, translation, diplomacy and cultural mediation. She is especially useful in answers on methods of conquest or the role of individuals.
· Analytical use: Mexico shows that conquest was a coalition war. Spanish victory depended on turning existing regional hostility toward the Aztec Empire into military and political advantage.

This image helps students visualise the diplomatic and symbolic encounter between Cortés, Moctezuma II and Malinche. Use it to discuss how conquest involved negotiation, translation and performance of authority, not just battlefield violence. Source

Peru: Pizarro, Atahualpa, Diego de Almagro and the campaign against the Incas

· Francisco Pizarro led the campaign against the Incas; use him to analyse opportunism, military risk-taking and exploitation of internal divisions.
· Atahualpa is central because his capture symbolised how Spanish forces used leadership decapitation to destabilise imperial authority.
· Diego de Almagro is named in the syllabus and is useful for showing that conquest was also shaped by rivalries among Spaniards over rewards, territory and status.
· Alliances with indigenous populations also mattered in Peru. As in Mexico, Spanish conquest was not purely Spanish versus indigenous; local groups could support Spaniards against Inca rule.
· Analytical use: Peru shows how quickly Spanish forces could exploit a crisis of imperial succession and convert a political shock into territorial conquest.

This image supports discussion of the encounter between Pizarro and Atahualpa and the importance of political theatre in conquest. It is useful for comparing Peru with Mexico because both conquests involved decisive encounters with indigenous rulers. Source

Why indigenous alliances matter in both case studies

· Mexico: Cortés exploited resentment against Aztec tribute and dominance. Indigenous allies helped make Spanish success possible by providing warriors, guides, supplies and local knowledge.
· Peru: Pizarro benefited from divisions within the Inca world and alliances with groups opposed to Inca control.
· Comparison point: in both Mexico and Peru, Spanish forces were militarily small but politically effective because they inserted themselves into existing conflicts.
· Judgement point: alliances were not a secondary detail; they challenge the simplistic idea that Spanish weapons alone explain conquest.
· Exam use: in any “reasons for Spanish success” question, make alliances with indigenous populations one of the main analytical factors.

Named actors as exam evidence

· Hernán Cortés — Mexico, 1519 onwards: demonstrates leadership, opportunism, alliance-building and the campaign against the Aztec Empire. Use for questions on methods and reasons for success.
· Moctezuma II — Aztec ruler: demonstrates the challenge indigenous rulers faced when confronting Spanish diplomacy, violence and internal pressures. Use for analysis of leadership and political vulnerability.
· Malinche — translator and intermediary: demonstrates the importance of language, diplomacy and cultural mediation. Use to show that conquest depended on information and negotiation.
· Francisco Pizarro — Peru: demonstrates opportunism and the use of ruler capture to destabilise the Incas. Use for questions on key actors and campaign methods.
· Atahualpa — Inca ruler: demonstrates the impact of leadership crisis and political shock. Use in answers about why the Inca state was vulnerable.
· Diego de Almagro — Spanish actor in Peru: demonstrates Spanish rivalries and competition over conquest rewards. Use to complicate arguments that Spaniards acted as one united group.
· Bartolomé de las Casas — critic of indigenous exploitation: use for debates over the moral and religious legitimacy of conquest and the treatment of indigenous peoples.
· Juan Ginés Sepúlveda — defender of conquest arguments: use for the ideological conflict over whether conquest and forced rule could be justified.

Impact on indigenous populations: social, economic and trade change

· Social impact: conquest disrupted indigenous hierarchies, communities and authority structures. It produced new forms of Spanish control over indigenous labour and settlement.
· Economic impact: Spanish rule redirected labour and resources toward colonial extraction and imperial trade. The encomienda and Mita systems show how conquest became structured exploitation.
· Encomienda: Spanish settlers received rights to indigenous labour or tribute in return for supposed protection and Christian instruction. Use it to show the link between religious justification and economic exploitation.
· Mita: adapted from an Andean labour obligation into a colonial labour system, especially associated with Peru. Use it to compare Peru’s mining/labour economy with Mexico’s broader tribute and labour structures.
· Trade: conquest connected American resources to Spanish and Atlantic systems. Use this to argue that the impact was not only local; it reshaped imperial wealth and global exchange.

This image helps explain how conquest produced organised colonial labour demands. Use it to connect religious justification, Spanish authority and economic exploitation in the encomienda system. Source

Demographic change and disease

· Causes of demographic change: warfare, forced labour, social disruption and especially the spread of disease contributed to catastrophic population decline among indigenous peoples.
· Disease: epidemics were devastating because indigenous populations had no prior exposure to many Afro-Eurasian diseases. Use disease as a major factor in both conquest and post-conquest collapse.
· Mexico: disease weakened the Aztec world during and after the Spanish campaign, making military and political recovery harder.
· Peru: disease and disruption interacted with internal conflict and Spanish violence, undermining Inca resilience.
· Judgement point: disease was not a stand-alone explanation. It became historically decisive because it combined with conquest, labour exploitation and political collapse.

Cultural impact: religion and language

· Religion: the Spanish promoted Catholic conversion as a justification and consequence of conquest. This transformed public worship, education and authority.
· Language: Spanish became a language of colonial administration and power, though indigenous languages survived and shaped colonial society.
· Cultural change was uneven: conversion and language change did not mean total cultural erasure; indigenous communities adapted, resisted and blended traditions.
· Exam use: use religion and language to show long-term impact beyond military conquest. These are especially useful for questions about extent of change or cultural consequences.

Mexico and Peru compared: fast revision grid

· Main Spanish leader: Cortés in Mexico; Pizarro in Peru. Both used bold leadership, violence and political manipulation.
· Indigenous ruler: Moctezuma II in Mexico; Atahualpa in Peru. Both are useful for analysing ruler vulnerability and Spanish exploitation of authority.
· Indigenous allies: crucial in both. Mexico often offers the clearer example of anti-Aztec alliances; Peru shows the role of divisions within and around the Inca world.
· Main Spanish method: Mexico involved alliance-building and siege warfare against the Aztec Empire; Peru involved the capture of Atahualpa and exploitation of succession crisis.
· Economic impact: both produced labour exploitation, but Mita is especially strong for Peru, while encomienda is useful across Spanish America.
· Cultural impact: both experienced Catholic conversion, Spanish language influence and restructuring of indigenous life.
· Best judgement: similarities are stronger in motives and impacts; differences are stronger in the political situation Spaniards exploited and the precise method of conquest.

This page is useful for comparing the staged representation of conquest with the historical processes of alliance, violence and imperial collapse. It supports revision on how Mexico’s conquest became a powerful colonial memory. Source

Las Casas vs Sepúlveda: how to use the conquest debate

· Bartolomé de las Casas: use as evidence that some Spaniards criticised brutality and exploitation of indigenous populations. He helps students analyse the moral and religious controversy created by conquest.
· Juan Ginés Sepúlveda: use as evidence for arguments defending Spanish domination and conquest. He represents the attempt to justify conquest through claims about civilisation, religion and hierarchy.
· Comparison point: Las Casas and Sepúlveda are not just “good versus bad” figures; they show that conquest produced a debate over law, morality, religion and empire.
· Exam use: include them in answers on religious arguments for conquest, treatment of indigenous populations, or the contradiction between Christian mission and coercive labour.

How to build high-scoring Paper 1 arguments

· For causes/motives questions, group arguments into economic motives, political motives and religious arguments, then judge which was most important.
· For methods questions, prioritise alliances with indigenous populations, leadership, diplomacy, violence, capture of rulers and exploitation of internal divisions.
· For impact questions, separate short-term conquest effects from long-term colonial systems: demographic decline, encomienda, Mita, trade, religion and language.
· For compare questions, use paired evidence: Cortés/Moctezuma II/Malinche against Pizarro/Atahualpa/Almagro.
· For evaluation questions, avoid single-cause answers. Strong judgements weigh interaction: Spanish ambition + indigenous divisions + disease + labour systems.

Compact evidence bank for essays

· 1519 — Cortés begins campaign in Mexico: use for Spanish initiative, political ambition and alliance-building.
· Moctezuma II — Aztec ruler: use for leadership response, imperial vulnerability and Spanish exploitation of authority.
· Malinche — translator/intermediary: use for the role of communication, diplomacy and indigenous agency.
· Pizarro and Atahualpa — Peru: use for ruler capture, shock tactics and exploitation of Inca political crisis.
· Diego de Almagro — Spanish rival in Peru: use for internal Spanish competition over conquest rewards.
· Encomienda — colonial labour/tribute system: use for economic exploitation disguised by protection and conversion.
· Mita — colonial labour system in Peru: use for continuity/adaptation of labour obligations into Spanish exploitation.
· Las Casas and Sepúlveda — conquest debate: use for moral/religious controversy over conquest and treatment of indigenous peoples.

Exam traps and common mistakes

· Trap 1: writing a conquest story instead of analysis. Do not narrate Cortés or Pizarro step-by-step unless each detail proves a point about causes, methods or impact.
· Trap 2: overusing European superiority. Spanish weapons mattered, but indigenous alliances, political divisions and disease are essential.
· Trap 3: ignoring Peru. Many students know Mexico better; Paper 1 revision must cover both Aztec and Inca conquests.
· Trap 4: treating indigenous peoples as passive. The syllabus explicitly includes alliances with indigenous populations, so show agency and division.
· Trap 5: separating religion from economics too neatly. Encomienda shows that conversion language and labour exploitation often worked together.
· Trap 6: mentioning disease without analysis. Explain why disease mattered: it weakened resistance, accelerated demographic change and intensified colonial disruption.

This page supports big-picture revision on how conquest connected the Americas to Spanish imperial rule, trade, religion and culture. Use it after revising the evidence bank to connect the Mexico and Peru case studies to broader colonial impact. Source