Did attitudes regarding African Americans change as a result of the Civil War?

Explanation:

no it did not

The Emancipation Proclamation in 1863 freed African Americans in rebel states, and after the Civil War, the Thirteenth Amendment emancipated all U.S. slaves wherever they were. As a result, the mass of Southern blacks now faced the difficulty Northern blacks had confronted—that of a free people surrounded by many hostile whites. One freedman, Houston Hartsfield Holloway, wrote, “For we colored people did not know how to be free and the white people did not know how to have a free colored person about them.”

the use of email to replace slower surface mail.