When: The controversy began in 1833, when Dr. John Emerson, a surgeon with the U.S. Army, purchased Dred Scott, a slave, and eventually moved Scott to a base in the Wisconsin Territory.

Where:  He was born in Virginia  and he was taken to illinois and the winsconsin.

Why: because dred scott was not free even though he was in a free state

Who Dred Scott was a slave that was sold into slavery and Sanford was who he was trying to sue

What: he was trying to sue Sanford because he thought he was entitled to being free

How: dred scott went to the supreme court to try to persuade them to give him his freedom

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