Slavery in America started in 1619 when a Ditch ship brought 20 African slaves ashore in the British colony of Jamestown, Virginia
Many Pro-Slave men came to the territory’s to vote people out of the territory’s weren’t allowed to vote so this was illegal. They also killed and fought abolitionists who wanted to vote against slavery so that made the north ( who were mainly against slavery) upset and the south happy.
The answer is D I think I’m sorry if it’s wrong.
Louisiana purchase 1803
Lewis and Clark exposition 1804-1806
Missouri compromise 1820
Indian Removal act 1830
Oregon trail 1830-1843
Mexican American war 1846-1848
California goldrush 1849
Kansas-Nebraska act 1854
Homestead act 1862
Transcontinental Railroad 1863-1869
Klondike Goldrush 1896-1899
B. conditions for cash-crop farming were more favorable than in the southern colonies