Why was a national law against slavery needed even though the emancipation proclamation had been issued? a- slavery was. still widespread in the north. b- slavery was still widespread in the southc- the proclamation only applied to the confederacy. d- the proclamation only applied to states in the union.

The emancipation proc. only applied to the rebels, confederacy, who already rebelled so it did not even apply to them. hope this helps:)

The proclamation only applied to the Confederacy. The 1863 Emancipation Proclamation was aimed at southern slaves, seeking to weaken southern infrastructure and manpower during the war.  It would be only by the very end of the civil war, in 1865, that the Thriteenth Amendment would be passed by the House of Representatives and slavery abolished in the whole nation. It is also worth noting that while the 1863 proclamation did had an effect, the northern government did not had full authority on confederate states and so a post-war proclamation was needed.

true is the answer to this

answer: b.

explanation: