The Battle of Antietam was one of the bloodiest in American history. The war was photographed and many letters were sent home of the horrors seen at the battle.
The battle itself was a stalemate but the Union claimed victory. The battle kept Confederate forces in Maryland and prevented the war from entering the Union states. This convinced Lincoln to issue his Emancipation Proclamation which freed slaves in Confederate states. The proclamation was symbolic more than it had any actual effect. It gave the bloody war a moral reason to continue the fight. From that point the war became about unifying the Union--a Union that would be without slavery.
Answer: The correct answer is leading to the emancipation declaration
Explanation: In the battle of Antietan, more than 23,000 casualties in the one-day, making it the bloodiest day in American history. The Union victory at Antietam ended up in President Abraham Lincoln stating his Preliminary Emancipation Proclamation on September 22, 1862.
The period of competition for authority ended in late October 1917, when Bolsheviks routed the ministers of the Provisional Government in the events known as the October Revolution, and placed power in the hands of the soviets, or "workers' councils," which they largely controlled
