Why is 1945 singificant as a turning point in American history?

What are the names of the Historic American Girls' sister? What was the attitude of the south towords the reconstruction? What was William Byrd satirizing in his History of the Dividing Line? What is progressive society? Population in united states when declaration independence signed? Value of 1971 ike silver dollar? Who had the better general in the Civil War? How much did Levis 501 jeans cost in 1964? Was the march on Washington in 1963 violent? Who was Father Junipero Sierra? How did the philosophes' battles with the censors contribute to ideas about freedom of speech and press? What were the disputes called between the states? What do the Montgomery bus boycott the United Farm Workers strike the American Indian Movement's occupation of Alcatraz Island and the Asian Americans for Equality demonstration against discrimination? What is a Kennedy dollar worth? What year did the first black and white television come out in the US? How the slavery led to the growing divide of the Union prior to President Lincolen? What year did Ponce De Leon come to America? The treaty ending the War of 1812 was negotiated in? What were the headlines in 1958? What was the outcome of Juan ponce deLeon's voyages?