The Battle of Gettysburg, fought from July 1 to July 3, 1863, is historically significant as a turning point in the American Civil War. It marked the Union's first major victory over Confederate forces and halted General Robert E. Lee's invasion of the North. The battle resulted in approximately 51,000 casualties, making it one of the bloodiest encounters in American history. Its outcome galvanized the Union war effort and motivated President Abraham Lincoln to deliver the Gettysburg Address, emphasizing national unity and the principles of freedom and democracy. The battle is often viewed as a pivotal moment that shaped the future of the United States.