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First teaching 2024

First exams 2026

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The American Civil War, 1861-1865 (Edexcel GCSE History)

Revision Note

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Natasha Smith

Written by: Natasha Smith

Reviewed by: Bridgette Barrett

How Important was the American Civil War on the Plains? - Timeline & Summary

A timeline of key events from 1861 to 1865: 1861 - Confederacy forms, Civil War starts; May 1862 - Homestead Act passed; July 1862 - Pacific Railroad Act passed; 1865 - Civil War ends.

The American Civil War took much of the government's attention and resources. This left the Plains relatively untouched by major developments. However, the aftermath of the American Civil War brought about several important changes. These changes influenced the development of the Plains.

One key impact of the American Civil War on the Plains was an increase in westward expansion and settlement. After the war, the federal government sought to promote settlement in the West. This would help to rebuild the nation after the conflict. As a result, the US government passed key laws to encourage migration. In 1862, the government introduced the Homestead Act and the Pacific Railroad Act. This opened the West up to more settlers, increasing the development of the West.

The American Civil War forced many Indigenous tribes in the West to move or enter into reservations. The end of the Civil War increased US settlers in the Plains. This created more conflicts between settlers and Indigenous tribes.

What Caused the American Civil War?

  • The US government had representatives from:

    • The northern states like New York

    • The southern states like Texas

  • North and South had different ideas about how to govern the West

Opinions of the North

Opinions of the South

New states should not use slave labour. Instead of plantations, the West should have family farms worked on by free individuals

Southern states relied on slavery for their wealth. They believed that slavery should be legalised in the new states in the West

  • In 1861, seven southern states left the USA

    • They established their own government called the Confederacy

    • Four more states joined later

  • The Confederacy triggered the American Civil War

Examiner Tips and Tricks

For your exam, you do not need to know everything about the American Civil War. Ensure you know the causes of the conflict and its outcomes on the development of the West.

How did the American Civil War Affect the Development of the West?

  • After four years of fighting, the Confederacy lost the Civil War

    • Over 600,000 Americans had died

    • The conflict wounded another 400,000 Americans

  • The Civil War had significant impacts

Positive impacts

Negative impacts

The US government granted citizenship to Black Americans

The US government had to repair the significant damage to the southern states caused by the Civil War

Ex-soldiers and former enslaved people travelled to the West to start new lives

The Confederacy rejoined the USA. They maintained racist laws in their states

  • In 1862, without opposition from the Confederacy, the US government introduced two key laws that encouraged the development of the West:

Worked Example

Explain one consequence of the American Civil War (1861-1865)

4 marks

Partial answer:

One consequence of the American Civil War was laws that encouraged the development of the West. In 1862, the US government passed the Homestead Act and the Pacific Railroad Act. The American Civil War allowed this to happen as the southern states had formed the Confederacy. As a result, they were unable to oppose the acts. This helped the development of the West as it encouraged more US citizens to settle in the West and improved its infrastructure.

Examiner Tips and Tricks

In the American West exam, this style of question would ask you to explain one consequence of an event. The mark scheme offers 4 marks per consequence. To gain 4 marks, you should include:

  • The identified consequence of the event that is stated in the question

  • Specific own knowledge linked to the event that shows an in-depth knowledge of the period

  • Using the own knowledge to explain the consequence of the chosen event

This question has previously asked you to explain two consequences. In the American West exam paper for 2025, this question will ask you to explain one consequence. However, there will be two different "explain the consequence of" questions each, worth four marks. 

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Natasha Smith

Author: Natasha Smith

Expertise: History Content Creator

After graduating with a degree in history, Natasha gained her PGCE at Keele University. With more than 10 years of teaching experience, Natasha taught history at both GCSE and A Level. Natasha's specialism is modern world history. As an educator, Natasha channels this passion into her work, aiming to instil in students the same love for history that has fuelled her own curiosity.

Bridgette Barrett

Author: Bridgette Barrett

Expertise: Geography Lead

After graduating with a degree in Geography, Bridgette completed a PGCE over 25 years ago. She later gained an MA Learning, Technology and Education from the University of Nottingham focussing on online learning. At a time when the study of geography has never been more important, Bridgette is passionate about creating content which supports students in achieving their potential in geography and builds their confidence.