7.5 Unresolved Tensions After World War I

After World War I ended in 1918, Western and Japanese imperial states mostly kept control of their colonies and sometimes gained new territory through treaty settlements or military expansion, even as colonized peoples pushed back. This topic is about continuity and change in who held territory from 1900 onward, and why the postwar settlement left big tensions unresolved.

AP World 7.5 Unresolved Tensions After WWI

AP World 7.5 focuses on continuity and change after World War I. The key pattern is that Western and Japanese imperial states mostly kept or expanded control, while colonized peoples became more organized in their resistance.

For the exam, connect specific evidence to that pattern. League of Nations mandates show continued imperial control under a new name, Japanese expansion in Manchuria shows empire-building after the war, and groups like the Indian National Congress show anti-imperial resistance growing before decolonization.

Why This Matters for the AP World History Exam

This topic builds your ability to track continuity and change over time, one of the core historical reasoning skills tested on the AP World History exam. You should be able to explain how empires held onto or expanded their territory after the war while facing anti-imperial resistance.

It also connects backward to imperialism and World War I and forward to the causes of World War II and decolonization. That makes it useful for causation questions and for building arguments that span multiple units. Expect to use this content on multiple-choice questions and as supporting evidence in free-response writing, where you can show change (rising resistance) alongside continuity (empires staying in control).

Key Takeaways

• Between the two world wars, Western and Japanese imperial states mostly kept control of their colonial holdings.
• Some imperial states gained new territory through military expansion or treaty settlement after the war.
• Former German colonies were transferred to Great Britain and France under the League of Nations mandate system.
• Japan expanded in East Asia, including Manchukuo and the Greater East Asia Co-Prosperity Sphere.
• Anti-imperial resistance grew, including the Indian National Congress and West African strikes and congresses against French rule.
• The pattern was both continuity (empires staying in power) and change (resistance gaining strength), which sets up later decolonization.

The Core Idea: Empires Held On, Resistance Grew

The peace settlements after World War I did not end imperialism. Instead, Western and Japanese imperial states predominantly maintained control over their colonies. In some cases they expanded, either through military expansion or through treaty arrangements that handed them new land. At the same time, more people in colonized regions organized against imperial rule. Keeping both halves of that statement in mind is the key to this topic.

Territorial Gains After the War

League of Nations Mandates

When the war ended, the empires of the defeated Central Powers were broken up. Former German colonies were transferred to Great Britain and France under the League of Nations mandate system. On paper, mandates were described as territories governed temporarily until the people could rule themselves. In practice, they functioned much like colonies under a new name, which fueled frustration among people who had expected greater self-rule after contributing to the war effort.

Japanese Expansion in East Asia

Japan was an imperial power that gained territory in this period. Japan invaded Manchuria in 1931 and set up the puppet state of Manchukuo, then later framed its broader expansion as the Greater East Asia Co-Prosperity Sphere. Japan claimed to be liberating Asians from Western control, but in practice this was a cover for military expansion and exploitation. Japanese expansion is a clear example of an imperial state gaining additional territory through military expansion in the interwar years.

Anti-Imperial Resistance

While empires held on, resistance to imperial rule became more organized.

Indian National Congress

In British India, the Indian National Congress became the center of anti-colonial politics. Indian nationalists organized to demand greater self-rule and challenged British authority through mass political movements. This resistance kept pressure on Britain and gained international attention, even though independence would not come until after World War II.

West African Resistance to French Rule

In French-controlled West Africa, people organized strikes and political congresses to push back against colonial rule and demand greater autonomy. These movements built networks and leadership that would matter later, during the wave of decolonization after World War II.

Postwar Ideals and Their Limits (Application/Context)

The following details help explain the tensions but are background context rather than the required focus of this topic.

At the 1919 Paris Peace Conference, U.S. President Woodrow Wilson promoted ideas including self-determination for various peoples and an international peacekeeping body, the League of Nations. Many colonized peoples hoped these ideals would translate into greater autonomy after they had supplied troops and resources during the war. Instead, imperial powers largely kept and even expanded their holdings, and the gap between the language of self-determination and the reality of continued empire deepened resentment that fed later resistance.

Summary Table: Postwar Tensions and Their Consequences

How to Use This on the AP World History Exam

MCQ

Multiple-choice questions may pair this topic with a map, treaty excerpt, or political cartoon. Watch for sources about mandates or about resistance movements. The correct answer usually reflects the two-sided pattern: empires kept or expanded control while facing rising opposition.

Free Response

When this topic shows up in writing, use it to argue continuity and change over time. Continuity: imperial states stayed in power and even gained land. Change: anti-imperial movements grew stronger and more organized. Strong evidence includes the League of Nations mandate system, Japanese expansion such as Manchukuo, the Indian National Congress, and West African strikes and congresses against French rule.

Common Trap

Do not claim that World War I ended imperialism or that mandates gave colonized peoples independence. The opposite is closer to the truth: empires mostly held on, and mandates kept colonial control in place under a new label.

Common Misconceptions

• "The war led to immediate decolonization." Empires mostly kept control between the wars. Widespread independence came after World War II.
• "Mandates meant self-government." Mandates were governed by Britain and France and worked much like colonies, even though the stated goal was eventual self-rule.
• "Only European powers expanded." Japan was a major imperial power that gained territory through military expansion in this period, including Manchukuo.
• "Resistance failed because independence did not come yet." Interwar movements like the Indian National Congress and West African congresses built the organization and leadership that powered later decolonization.
• "Wilson's self-determination applied to everyone." In practice, colonized peoples were largely left out, which is part of why resentment grew.

Related AP World History Guides

• Unit 7 Overview: Global Conflict
• 7.1 Shifting Power After 1900
• 7.2 Causes of World War I
• 7.4 Economy in the Interwar Period
• 7.3 Conducting World War I
• 7.6 Causes of World War II