The Zong Massacre was a mass-killing of Africa

Africa

Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

n slaves that took place on November 29th, 1781, on the Zong, a British slave ship

Slave ship

Slave ships were large cargo ships specially converted for the purpose of transporting slaves, especially newly purchased African slaves to Americas....

 owned by James Gregson and colleagues in a Liverpool

Liverpool

Liverpool is a city and metropolitan borough of Merseyside, England, along the eastern side of the Mersey Estuary. It was founded as a borough in 1207 and was granted city status in 1880...

 slave-trading firm.

The resulting court case, brought as a civil action by the ship-owners seeking compensation from the insurers for the slave-traders' lost "cargo", was a landmark in the battle against the African slave trade

African slave trade

Systems of servitude and slavery were common in many parts of Africa, as they were in much of the ancient world. In some African societies, the enslaved people were also indentured servants and fully integrated; in others, they were treated much worse...

 of the eighteenth century.

The term "Zong Massacre" was not universally used at the time.