Why does lincoln at gettysburg makes the gettysburg address speech?

The Gettysburg Address is the most famous speech by President Abraham Lincoln. It was pronounced in the Dedication of the Soldiers' National Cemetery in the city of Gettysburg (Pennsylvania) on November 19, 1863, four and a half months after the Battle of Gettysburg during the American Civil War. Although Lincoln's carefully worded speech was secondary to other speeches of the day, it has been considered later as one of the greatest speeches in the history of mankind, or, at least, one of the most famous and cited of the modern era . Invoking the principles of equality of men enshrined in the Declaration of Independence, Lincoln redefined the Civil War as a new birth of freedom for the United States and its citizens.

What was considered the Gettysburg Address that day was not the brief speech delivered by President Lincoln, but the speech delivered by Edward Everett. Everett was a renowned diplomat and scholar considered to be the best orator of his time.

Everett's speech had 13,609 words and lasted two hours. In contrast, Lincoln's brief words summed up the war in two or three minutes, in ten sentences, and in less than 300 words.

Lincoln's few selected words resonated throughout the nation and throughout history, challenging Lincoln's own prediction that "the world will notice little, not much time will remember what we say here." While there is little documentation of the other speeches of that day, Lincoln's words, which we quote below in a translation into Spanish, are considered one of the great speeches in history. Its influence has been so great, not only in the United States, that the formula of "government of the people, by the people and for the people" to define democracy has been adopted even in Article 2 of the Constitution of the Fifth French Republic.

they thoght they were going to nuke each other

b - those executed came from every social and economic class