In what year was the act of transporting salves into other countries banned?

The year was 1807

Explanation

The 1807 act was a comprehensive attempt to close the slave trade. By passing the law in March, Congress gave all slave traders nine months to close down their operations in the United States. Article 1, Section 9 of the U.S. Constitution protected the slave trade for twenty years. Only starting January 1, 1808, could laws become effective to end the slave trade.Slavery Abolition Act, (1833), in British history, act of Parliament that abolished slavery in most British colonies, freeing more than 800,000 enslaved Africans in the Caribbean and South Africa as well as a small number in Canada. It received Royal Assent on August 28, 1833, and took effect on August 1, 1834.May 5, 2020

a reason that was key to coolidge's victory in the 1924 presidental election was that; democratic party supporters were split in the north and south.