Which major event occurred soon after the U.S. Supreme Court ruling that the Scotts would not be freed? World War I, when Germany declared war on Russia B the Louisiana Territory purchase, which doubled the size of the United States C the Civil War, a conflict between the North and the South c D the March on Washington, to protest racial discrimination D

## Step 1<br />The problem is a historical question that requires knowledge of the timeline of events in the United States. The question asks for the major event that occurred soon after the U.S. Supreme Court ruling that the Scotts would not be freed.<br />## Step 2<br />The Scotts' case, known as the Dred Scott v. Sandford case, was a landmark decision by the U.S. Supreme Court in 1857. The court ruled that African Americans, whether free men or slaves, could not be American citizens and therefore had no standing to sue in federal court. The court also declared that the federal government had no power to regulate slavery in the federal territories acquired after the creation of the United States.<br />## Step 3<br />Given the options, the event that occurred soon after the Scotts' case was the Civil War, a conflict between the North and the South. The Civil War began in 1861, just four years after the Scotts' case was decided. This war was a direct result of the tensions and conflicts over slavery and states' rights that the Scotts' case had exacerbated.