What happened when the southern states seceded? did they dissolve their ties to the us, and nullify results of the 1860 election?

In 1964 congress of racial equality and the student nonviolent coordinating committee launched

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.

Brainliesttt ! : ) -global military, political, and psychological responses to terrorism?