What reason did east germany give for the construction of the berlin wall answers?

The GDR stated it was constructed as an "antifascist protection mechanism" in order to keep out external threats and keep the east Berliners safe in their "Socialist Paradise" but in reality it was to keep people in since many were trying to emigrate out of the communist zone and the GDR would fall because of emigration. 

The eastern area of Germany that was held by the Soviets became the so-called German Democratic Republic (RDA), and the other three formed a single area, which was the Federal Republic of Germany (FRG).

In the following years, the western zone began to prosper while the Soviet side suffered economic problems. This, caused millions of Berliners who lived under the communist regime to migrate to West Berlin.

It is for this reason that the authorities of the GDR decided to build a provisional wall that divided the city in two.

                 

The battle of the Antietam affected the focus of the civil war by leading to the emancipation proclamation.

Explanation: The Battle of Antietam was important to the Union Army, as their goal was to keep the Confederate forces from encroaching onto Union soil. This battle is considered by many historians as a tie. However, General George B. McClellan did his job by forcing the Confederate Army to retreat back into Virginia. This retreat by the Confederate Army convinced President Abe Lincoln that the Union had "won" the battle and he could finally give the Emancipation Proclamation. If the Confederates won this battle, he would have not given this address due to their close proximity to the nation's capital.