The battle of Antietam was known as the bloodiest war that happened in America. Here, the <span>Union won the battle which led to the Emancipation Proclamation. The proclamation </span><span>was given by President Lincoln who declared the freedom of slaves in the South. </span><span>This immediately helped the slaves escape the Confederates and go to the Union based areas.</span>
From the diary of a Surgeon at Valley Forge
Because non-communist governments wanted to control its spread, and prevent other countries from becoming communist. I guess because communism's style of governance is unfair to some.