AP United States History

## Learning Outcomes

- Explain how the **Spanish-American War** marked a shift from continental expansion to overseas empire
- Identify what the **Treaty of Paris (1898)** gave the United States and how each territory was treated differently
- Distinguish between the status of **Cuba**, **Puerto Rico**, **Guam**, and the **Philippines**
- Understand the main arguments used by imperialists and anti-imperialists
- Explain why the **Philippine-American War** exposed tensions between American ideals and imperial rule
- Analyse how the **Insular Cases** reshaped ideas about citizenship, rights, and empire
- Use precise evidence and distinctions in SAQ, DBQ, and LEQ answers

## AP United States History Syllabus

For the AP United States History, you are expected to understand territorial acquisitions and the imperial debate after the Spanish-American War, with a focus on the following syllabus points:

- Know that the **Treaty of Paris (1898)** ended the war and transferred **Puerto Rico** and **Guam** to the United States while ceding the **Philippines** for **$20 million**
- Identify the key distinction that **Cuba was not annexed**, despite later U.S. control through the **Platt Amendment**
- Explain the difference between the **Spanish-American War** and the **Philippine-American War**
- Understand why the annexation of the **Philippines** produced the strongest anti-imperialist opposition
- Know the role of the **Anti-Imperialist League** and the arguments it made about self-government and consent of the governed
- Explain how the **Insular Cases** established the idea that the Constitution did not fully apply in overseas possessions
- Distinguish between formal territorial possession and informal control or protectorate influence
- Understand how these events connect to **America in the World** and **Politics and Power** themes in Period 7

## Test Your Knowledge

_Attempt these questions before reading this article. If you find some difficult or cannot remember the answers, look more closely at that area during your revision._

1. What territories did the United States gain under the **Treaty of Paris (1898)**?
2. Why is it incorrect to say that the United States annexed **Cuba** in 1898?
3. Why did the annexation of the **Philippines** cause more debate than the acquisition of **Guam**?
4. What did the **Insular Cases** decide about constitutional rights in overseas territories?
5. How did imperialists and anti-imperialists disagree about the meaning of American democracy?

## Introduction

The aftermath of the Spanish-American War is one of the clearest turning points in APUSH Period 7. Before **1898**, the United States had focused mainly on continental growth. After **1898**, it held overseas possessions in the Caribbean and Pacific. That raised a difficult question: could a republic founded on self-government also rule distant peoples who had not consented to American control?

This issue matters because APUSH questions rarely ask only what the United States gained. They usually test whether you understand the contradictions of empire. Students must know the map changes, but they also must explain why **Cuba**, **Puerto Rico**, **Guam**, and the **Philippines** did not all receive the same treatment, and why that mattered politically and legally.

> **Key Term: imperialism**
> A policy in which a nation extends power over other territories or peoples, often for strategic, economic, or political reasons.

### What the Treaty of Paris changed

The most important starting point is the **Treaty of Paris**, signed on **December 10, 1898**. It ended the Spanish-American War and formalised the transfer of territory.

Spain:

- relinquished sovereignty over **Cuba**
- ceded **Puerto Rico** to the United States
- ceded **Guam** to the United States
- ceded the **Philippines** to the United States for **$20 million**

Students often flatten this into a single fact: “the U.S. got overseas territory.” That is too simple for APUSH. Each possession mattered differently.

**Puerto Rico** became a U.S. possession in the Caribbean and remained under American control.  
**Guam** mattered mainly as a Pacific naval and coaling station.  
**The Philippines** became the biggest imperial problem because millions of Filipinos had expected independence, not a transfer from one colonial ruler to another.  
**Cuba** was the major exception: Spain gave it up, but the United States did not formally annex it.

> **Key Term: Treaty of Paris (1898)**
> The treaty that ended the Spanish-American War and transferred Puerto Rico, Guam, and the Philippines to the United States, while Spain relinquished Cuba.

The distinction over Cuba is one of the most tested points in this topic. During the war, Congress passed the **Teller Amendment** in **1898**, promising that the United States would not annex Cuba. This allowed U.S. leaders to present intervention as support for Cuban independence, not conquest.

But the later reality was more complicated. Even though Cuba was not annexed, the **Platt Amendment** of **1901** sharply limited Cuban independence. It allowed U.S. intervention in Cuban affairs, restricted Cuba’s ability to make treaties, and enabled the United States to keep a naval base at **Guantánamo Bay**.

So the correct APUSH wording is not “Cuba became a U.S. territory.” It is better to say Cuba became formally independent but functioned as an American protectorate or quasi-protectorate.

> **Key Term: Teller Amendment**
> The 1898 declaration that the United States would not annex Cuba after the war with Spain.
>
> **Key Term: Platt Amendment**
> The 1901 measure that limited Cuban independence and gave the United States the right to intervene in Cuba.

This difference matters because it shows a pattern: American leaders often used the language of liberty while keeping the substance of control.

> **Test Tip:** If an SAQ or multiple-choice item asks about Cuba after 1898, do not say the U.S. annexed it. A more accurate phrase is “formally independent but under strong U.S. influence.”

### Why the Philippines caused the fiercest debate

The **Philippines** produced the sharpest imperial debate because American policy there most clearly clashed with the idea of self-determination. Filipino nationalists, led by **Emilio Aguinaldo**, had fought against Spanish rule and expected independence after Spain’s defeat.

Instead, the United States decided to keep the islands.

Imperialists defended annexation in several ways.

First, they argued from strategy. The Philippines would give the United States a foothold in the Pacific and a gateway to Asian markets, especially China. This argument fits the larger late nineteenth-century interest in naval power and overseas bases.

Second, they argued from economics. Business leaders and expansionists wanted “stepping stones” to trade. A Pacific empire could support commerce across the ocean and strengthen American world-power status.

Third, they argued from nationalism and racial hierarchy. Some supporters claimed the United States had a duty to “civilize” and govern peoples they viewed as unready for self-rule. This was often expressed through the language of the **“white man’s burden.”**

> **Key Term: white man’s burden**
> The idea, used by some imperialists, that white powers had a duty to rule and “civilize” nonwhite peoples.

Anti-imperialists attacked annexation just as strongly.

They argued that ruling another people without consent violated the nation’s founding principles. If the United States had once rebelled against empire, how could it now become an empire itself? They pointed to the **Declaration of Independence**, republicanism, and Lincoln’s ideas about self-government.

The **American Anti-Imperialist League**, founded in **1898**, became the best-known organised opposition. Its members included **Andrew Carnegie**, **Mark Twain**, **Samuel Gompers**, **Grover Cleveland**, and **George F. Hoar**. But students should avoid treating anti-imperialists as a single pure bloc. Some were principled defenders of self-government. Others feared the cost of occupation. Still others opposed annexation because they did not want nonwhite peoples incorporated into the American polity.

That mixed motive point is good evaluation. Anti-imperialism was not always morally consistent.

> **Key Term: Anti-Imperialist League**
> An organisation founded in 1898 that opposed U.S. annexation of overseas territories, especially the Philippines, on political and moral grounds.

The debate turned violent in the **Philippine-American War** of **1899–1902**. This was separate from the Spanish-American War. That distinction is essential.

The Spanish-American War was the conflict between the United States and Spain in **1898**.  
The Philippine-American War was the later conflict between the United States and Filipino nationalists after annexation.

Filipino forces resisted U.S. rule under Aguinaldo. The resulting war showed that imperial rule required military repression, not simply benevolent speeches. That strengthened the anti-imperialist case because it exposed the gap between American ideals and American actions.

> **Key Term: Philippine-American War**
> The war fought from 1899 to 1902 between the United States and Filipino nationalists resisting U.S. rule.
>
> **Test Tip:** A common error is to merge the Spanish-American War and the Philippine-American War into one event. Keep them separate: first war against Spain, second war against Filipino resistance.

### Comparing the territories instead of treating them as one empire

A strong APUSH answer compares outcomes rather than listing places.

Puerto Rico
The United States set up civilian government through the **Foraker Act** in **1900**. Later, the **Jones Act** of **1917** granted U.S. citizenship to Puerto Ricans. But Puerto Rico did not become a state, which shows that citizenship and full incorporation were not the same thing.

Guam
Guam had a smaller population and less political debate around it, but it mattered strategically. It was valuable as a naval and coaling station in the Pacific. This makes Guam a strong example of strategic empire rather than settlement empire.

Philippines
The Philippines involved direct annexation, anti-colonial resistance, and a war that made the contradictions of empire impossible to ignore. The islands remained under U.S. control until independence in **1946**.

Cuba
Cuba remained officially independent, yet heavily constrained. It is the best example of informal empire rather than formal annexation.

This comparison helps with causation and complexity. American imperialism was not one single model. It combined direct possession, indirect control, military occupation, and legal ambiguity.

### The legal debate: did the Constitution follow the flag?

Once the United States had overseas possessions, a new question appeared: what rights did the people living there have? This is where the **Insular Cases** become crucial.

The central issue was whether the Constitution automatically applied in full to newly acquired territories. In simple terms: did the Constitution “follow the flag”?

The Supreme Court’s answer was largely no.

In **Downes v. Bidwell (1901)**, the Court helped establish the doctrine of **unincorporated territories**. These territories belonged to the United States but were not fully part of it for all constitutional purposes.

That meant Congress could govern them differently from states or incorporated territories. Not all constitutional protections automatically applied.

Later, **Balzac v. Porto Rico (1922)** reaffirmed that even after U.S. citizenship was granted to Puerto Ricans, Puerto Rico remained an unincorporated territory.

> **Key Term: Insular Cases**
> A series of Supreme Court decisions beginning in 1901 that ruled the Constitution did not fully apply to all overseas territories.
>
> **Key Term: unincorporated territory**
> A territory controlled by the United States that belongs to, but is not fully part of, the United States for all constitutional purposes.

This was a major development because it allowed the United States to keep empire without granting full equality. In political terms, that solved a problem for imperialists. In moral terms, it deepened the contradiction.

If full rights were extended, imperial rule would become harder to maintain. If full rights were denied, the United States looked less like a republic of equal citizens and more like a colonial power. The Court’s doctrine effectively chose empire over equality.

### How to use this topic in APUSH essays

For an SAQ, the cleanest structure is often:

- identify the acquisition or policy
- explain its significance
- distinguish it from a similar but different case

For example:

- Treaty of Paris gave Puerto Rico, Guam, and the Philippines to the U.S.
- Cuba was not annexed
- Platt Amendment still limited Cuban sovereignty

For a DBQ or LEQ, the best arguments usually revolve around contradiction:

- expansion of liberty language alongside expansion of control
- strategic and economic motives versus democratic ideals
- continuity from **Manifest Destiny** thinking but change from continental to overseas empire

A strong thesis might argue that the Spanish-American War marked a turning point because the United States shifted from continental growth to overseas imperialism, but the debate over the Philippines and the Insular Cases showed that this new empire clashed with long-standing American ideals of self-government.

Use specific evidence:

- **1898 Treaty of Paris**
- **Teller Amendment**
- **Platt Amendment**
- **Emilio Aguinaldo**
- **Anti-Imperialist League**
- **Philippine-American War**
- **Downes v. Bidwell**

Avoid vague phrases like “America expanded overseas.” Name where, when, and how.

## Key Point Checklist

_This article has covered the following key knowledge points:_

- The **Treaty of Paris (1898)** ended the Spanish-American War
- Spain relinquished **Cuba** and ceded **Puerto Rico**, **Guam**, and the **Philippines**
- The United States paid **$20 million** for the **Philippines**
- **Cuba was not annexed**, which is a central distinction for APUSH
- The **Teller Amendment** promised that the U.S. would not annex Cuba
- The **Platt Amendment** later limited Cuban independence and allowed U.S. intervention
- The annexation of the **Philippines** caused the fiercest imperial debate
- **Emilio Aguinaldo** led Filipino resistance in the **Philippine-American War**
- The **Anti-Imperialist League** argued that empire violated self-government and consent of the governed
- Imperialists justified expansion through strategy, trade, nationalism, and racialised ideas of a civilising mission
- The **Insular Cases** ruled that the Constitution did not fully apply in all overseas territories
- The doctrine of **unincorporated territories** allowed the U.S. to hold empire without granting full constitutional rights

## Key Terms and Concepts

- imperialism
- Treaty of Paris (1898)
- Teller Amendment
- Platt Amendment
- white man’s burden
- Anti-Imperialist League
- Philippine-American War
- Insular Cases
- unincorporated territory


The Spanish-American War - Territorial acquisitions and imperial debate