Events relating to trade

A network of undercover abolitionists in the southern states of America help slaves escape to freedom in the north

Nat Turner leads a revolt by fellow slaves in Southampton County, Virginia, killing 59 whites and provoking more repressive legislation

Under the leadership of William Lloyd Garrison a society is formed in the USA calling for the immediate abolition of slavery

Sarah and Angelina Grimké join the abolitionist crusade, each publishing a powerful anti-slavery pamphlet in the same year

Mutiny by slaves on a Spanish vessel leads two years later to a significant abolitionist victory in the Amistad case

Britain sends four naval ships up the river Niger to make anti-slavery treaties with local kings

The Wilmot Proviso is defeated in the US Senate, heightening north-south tensions on the issue of slavery

The Scottish missionary David Livingstone is profoundly shocked by what he sees of the slave trade at the heart of Africa

Brazil, historically the world's second largest importer of slaves from Africa, finally bans the slave trade

The Fugitive Slave Act, concerned with the arrest of runaway slaves, is the most contentious part of the Compromise of 1850

Escaped slave Harriet Tubman makes the first of many dangerous journeys back into Maryland to bring other slaves into freedom

Harriet Beecher Stowe publishes a massively successful antislavery novel, Uncle Tom's Cabin, that sells 300,000 copies in its first year

An anti-slavery movement, formed in the USA to oppose the Kansas-Nebraska Act, adopts a resonant name, calling itself the Republican party

Commodore Matthew Perry, commanding a powerful US fleet, persuades the Japanese to open their country to western trade – ending their period of isolation

The controversial Kansas-Nebraska Act passes into law, enabling citizens of these territories to decide whether or not to allow slavery

Abolitionist John Brown presides over the lynching of five pro-slavery men at Pottawatomie in Kansas

Abraham Linclon comes to national prominence through his debates on slavery with Stephen Douglas, his rival for an Illinois seat in the Senate

John Brown is captured leading a group of abolitionists to seize arms from the federal arsenal at Harper's Ferry

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