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He didn't actually free them. They were freed by the Thirteenth Amendment, December 1865, eight months after his assassination.

He issued the Emancipation Proclamation, which declared the slaves to be free in all the states currently in rebellion - in other words, all the states which he didn't control.

This was chiefly a tactical wartime measure, to stop free nations abroad from helping the Confederates. Britain and France had to give up their plans to send military aid, or it would make them look pro-slavery themselves.

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12y ago

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