How did the cotton gin lead to a rise in slavery?

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

Write two paragraphs to explain how the cold war changed after the 1960s. first, identify the ways it changed during leonid brezhnev's leadership in the 1970s. then, explain how the cold war changed when ronald reagan was in office in the early 1980s. include supporting facts and details from the text in your response.

Where did zebulon pike spend most of his time exploring?