Lincoln gave the
to memorialize all of the fallen soldiers at the Battle of Gettysburg.
o Gettysburg Address
1st Inaugural Address
2nd Inaugural Address
Emancipation Proclamation

The address of Gettysburg was given in that situation.

Explanation:

The address of Gettysburg was given to the president after the devastating toll that the war had taken on the Union and they had come out visionaries turning the tide of the war but in a matter of terrible losses.

Thus, the nation needed an address and Lincoln had delivered saying that the martyrs of the war had gone down for the foundation of a new good society that would rise from the conflict and become a better USA.

This speech had inspired many to keep believing in the cause of the union