STOPIED DUDE
Slavery was officially abolished in New Jersey on January 29, 1804. The state passed a law that gradually phased out slavery over a number of years until it was fully abolished by 1865.
Slavery in Massachusetts was abolished after the Civil War ended in 1865. Even though it wasn't formally abolished until 1865 slavery had ended voluntarily in the state much earlier.
Texas
Delaware abolished slavery through a gradual process. In 1776, the state passed a law that allowed individuals born into enslavement after that year to be freed at the age of 28. Then, in 1865, after the ratification of the 13th Amendment to the U.S. Constitution, slavery was officially abolished in Delaware.
Vermont was the first state to abolish slavery.
Not slavery - slave-trading. It was the District of Columbia.
The Compromise of 1850 abolished slavery in the state of Washington DC. It also allowed California to become part of the union as a slave free state.
No state abolished slavery during the Revolutionary War. Massachusetts via its Constitution of 1780 did not recognize slavery and thusly "abolished" it, but no state abolished slavery as far as I can see before or "around the time" of the Revolutionary War.
Missouri abolished slavery on January 11, 1865 by adopting an amendment to its state constitution.
Missouri entered as a slave state. Slavery was abolished in Washington, D.C. The abolition of slavery in the district of Columbia
Slavery was gradually abolished in the border states during the Civil War. Kentucky abolished slavery in 1865 through a state constitutional amendment, while Maryland and Delaware also abolished slavery through state constitutions in 1864 and 1865, respectively. Missouri did not abolish slavery until January 1865 with a new state constitution.
Vermont was a territory that abolished slavery in 1777, but technically Pennsylvania was the first STATE to abolish slavery, doing so in 1780.