#historyonleo #onthisday On March 6th 1857 US Supreme Court in case of Dred Scott v. Sanford rules with 7-2 majority that US citizenship doesn't extend to black persons. The controversial decision, made during increasingly heated debates about slavery, radicalised both sides and largely contributed to the political crisis escalating into US Civil War. Decision was struck down by post-war Reconstruction Amendments to US Constitution.