What did the emancipation proclamation do to the US?
It's the document signed by Abraham Lincoln which ordered all the slaves in states fighting against the Union to be freed. This did NOT happen, but it helped the Union because people in other countries against slavery came to help the North because the Proclamation stated that the North was against slavery.
What did the harshest British critics say about the Emancipation Proclamation of US President Lincoln?
What proclamation told the Europeans that the US would stay out of Europe's business if Europe would stay out of affairs of the Americas?
The Emancipation Proclamation by US President Lincoln was a tactical war decision. As an aside, the Emancipation did not pertain to Union States and Washington DC, which had slavery. The Emancipation was aimed at the Confederate States and carried no weight there, except perhaps for "moral" reasons.