What was the immediate effect of president lincoln issuing the emancipation proclamation

It freed all slaves in States fighting for the confederacy.

Britain and France had to abandon their plans to send military aid to the Confederates.

By using the Proclamation as an instrument to turn the war into a crusade against slavery (which it hadn't been), Lincoln made it politically impossible for free nations abroad to help the South.

Both Britain and France had abolished slavery many years earlier, and could not be seen to fight for the cause of the slave-owners.Hope this helps:)

Countries of eastern europe.