Edexcel IGCSE History: America, From New Nation to Divided Union, 1783–1877 (4HI1)

Breadth Study B1, “America: from new nation to divided union, 1783–1877”, is one of eight breadth studies in change in Section B of Pearson Edexcel International GCSE History (4HI1) Paper 2. It covers almost a century: the making of the Constitution, westward expansion and the removal of Native Americans, the conflict over slavery that led to secession, the Civil War, and Reconstruction. Because it is a breadth study, questions focus on change and continuity across long periods, not only on single events.

Related: Revision notes | Practice questions | Paper 2 overview

Syllabus coverage

The 4HI1 specification (Issue 5, February 2026) names five themes running through B1 — the relationship of the separate states to the whole; slavery; the problems of an expanding nation; the role of government policy; and financial and economic factors. The (c) essay focuses on these themes over a period of at least 25 years, normally drawing on at least two key topics. The five key topics are:

1. Building a new nation, 1783–1809 — large and small states, slavery, Shays’ Rebellion, the Connecticut Compromise and the Constitutional Convention (1787), Federalists and Anti-federalists, the Bill of Rights, strict and loose constructionists, Jefferson’s presidency, the “1800 Revolution” and states’ rights.
2. Westward expansion and Native American removal, 1803–49 — opposition from Spain, Britain, Mexico and Native Americans; the Louisiana Purchase, the Transcontinental Treaty and the annexation of Texas; the Missouri Compromise; the Indian Removal Act and the Trail of Tears; Manifest Destiny, Texas and Oregon and the California Gold Rush.
3. Slavery, the South and the causes of secession, 1850–61 — the Compromise of 1850, the Kansas–Nebraska Act (1854), Bleeding Kansas and Dred Scott; the economic division between North and South; John Brown, Lincoln, Fort Sumter and the secession of South Carolina.
4. Civil War and the end of slavery, 1861–65 — reasons for Union victory, Lee, Sherman and Grant, the naval blockade, Lincoln and Davis, the Emancipation Proclamation and Gettysburg Address, Gettysburg and Vicksburg (1863), the March through Georgia (1864) and the destruction of the Southern economy.
5. A More Perfect Union? 1865–77 — Johnson and the Reconstruction Act (1867), the Freedmen’s Bureau, the Black Codes, the Civil Rights Acts of 1866 and 1875, the 13th, 14th and 15th Amendments, and the failure of Grant’s Peace Policy, Custer’s Last Stand and its aftermath.

How was the new nation built, 1783–1809?

After independence the states were loosely joined under the Articles of Confederation. Shays’ Rebellion (1786–87), an armed revolt by indebted farmers in Massachusetts, showed that the central government was too weak to keep order. At the Constitutional Convention in Philadelphia (1787) large states wanted representation by population and small states wanted equality; the Connecticut Compromise created a Senate with two members per state and a House of Representatives based on population. The clash over slavery produced the three-fifths clause for counting enslaved people.

Federalists such as Hamilton and Madison argued for ratification; Anti-federalists feared a powerful central government. Ratification was secured with the promise of a Bill of Rights (1791). Debate continued between loose constructionists (Hamilton, who used implied powers to create a national bank) and strict constructionists (Jefferson). Jefferson’s election in 1800 — the “Revolution of 1800” — was the first peaceful transfer of power between parties, and he championed states’ rights.

How did the nation expand west, 1803–49?

The Louisiana Purchase (1803) from France doubled the country’s size. The Transcontinental Treaty (1819) with Spain gained Florida and fixed the western border. Expansion raised the question of slavery: the Missouri Compromise (1820) admitted Missouri as a slave state and Maine as a free state and banned slavery north of 36°30’ in the rest of the Louisiana territory.

Native Americans resisted. Under Andrew Jackson the Indian Removal Act (1830) forced eastern nations west of the Mississippi; on the Trail of Tears (1838–39) thousands of Cherokee died. Americans moved into Texas, which won independence from Mexico (1836) and was annexed in 1845, and settlers took the Oregon Trail. The idea of Manifest Destiny — that Americans were destined to spread across the continent — justified war with Mexico (1846–48), and the California Gold Rush (from 1848) brought a flood of migrants.

Why did the South secede in 1860–61?

The North was industrialising and relied on free labour; the South’s economy depended on cotton grown by enslaved people. The Compromise of 1850 admitted California as a free state but imposed a stricter Fugitive Slave Act, angering Northerners. The Kansas–Nebraska Act (1854) let settlers decide on slavery, overturning the Missouri line and producing violence in Bleeding Kansas. In Dred Scott (1857) the Supreme Court ruled that black people were not citizens and that Congress could not ban slavery in the territories. John Brown’s raid on Harpers Ferry (1859) terrified Southerners. When Abraham Lincoln, of the anti-slavery-expansion Republican Party, won the 1860 election, South Carolina seceded, followed by other Southern states, which formed the Confederacy. The war began when Confederates fired on Fort Sumter (April 1861).

Why did the Union win the Civil War?

The Union had far more people, industry and railways, and its naval blockade strangled Southern trade. The Confederacy had skilled generals, above all Robert E. Lee, and fought on home ground. 1863 was the turning point: Lee was defeated at Gettysburg and Vicksburg surrendered to Grant, giving the Union control of the Mississippi. Lincoln’s Emancipation Proclamation (1863) made the war a fight against slavery and discouraged European recognition of the Confederacy; the Gettysburg Address defined the war as a struggle for a “new birth of freedom”. Sherman’s March through Georgia (1864) destroyed railways, farms and morale. Lincoln’s political leadership proved stronger than Jefferson Davis’s. Lee surrendered in April 1865, leaving the Southern economy in ruins.

How far did Reconstruction create “a more perfect union”, 1865–77?

The 13th Amendment (1865) abolished slavery. President Andrew Johnson let Southern states return quickly, and they passed Black Codes restricting freed people. Congress responded with the Freedmen’s Bureau, the Civil Rights Act of 1866, the Reconstruction Act (1867), which placed the South under military rule until states accepted the 14th Amendment (citizenship and equal protection), and the 15th Amendment (1870), which barred racial discrimination in voting. The Civil Rights Act of 1875 banned discrimination in public places but was poorly enforced. White Southern resistance, including the Ku Klux Klan, steadily reversed gains. In the West, Grant’s Peace Policy towards Native Americans failed; the defeat of Custer at the Little Bighorn (1876) was followed by the forced removal of the Sioux to reservations.

Frequently asked questions

What is the best way to revise a breadth study? Track each theme across the whole period — for example, how the slavery question changed from 1787 to 1877.

Was slavery the main cause of the Civil War? Strong answers link slavery to states’ rights, economic difference and expansion rather than treating them as separate causes.

Did Reconstruction succeed? Legally it transformed the Constitution; in practice many gains were lost after 1877.

Official syllabus

Pearson Edexcel International GCSE History (4HI1) specification, Issue 5, February 2026, Paper 2, Breadth Study B1 — qualifications.pearson.com.