China refused to establish tradings ports for the British. Opium, the addictive drug that it is, left China no choice but to supply itself with more from the British.
The louisiana purchase doubled the size of the U.S.
This is True.
He was anti-progressivist when it came to ideology and he wanted the country to focus on its own betterment, not just on being progressive.
Dred Scott v. Sandford (1857)
However, when the case reached the U.S. Supreme Court, it ruled that Scott would remain a slave because as such he was not a citizen and could not legally sue in the federal courts.
Important progress was made, such as full development of the decimal place-value system to include decimal fractions, the first systematized study of algebra, and advances in geometry and trigonometry. Arabic works played an important role in the transmission of mathematics to Europe during the 10th to 12th centuries.
Sure hope this helps you :)