While the Battle of Gettysburg is the most widely cited (often in combination with the Siege of Vicksburg, which concluded a day later), there are several other arguable turning points in the American Civil War.
https://en.wikipedia.org/wiki/Turning_point_of_the_American_Civil_War
Photos from the Library of Congress and Gettysburg NMP Archives. The American Civil War was a conflict between the United States of America, represented by the Union, and The Confederate States of America, represented by the Confederacy fought between 1861 and 1865.
http://www.gettysburgfoundation.org/35/history-and-relevance
To the left (east) of The Angle stone wall was the farthest advances of the units of Longstreet's assault during the 1863 Battle of Gettysburg. The high-water mark of the Confederacy refers to an area on Cemetery Ridge near Gettysburg, Pennsylvania, marking the farthest point reached by Confederate forces during Pickett's Charge on July 3, 1863.
https://en.wikipedia.org/wiki/High-water_mark_of_the_Confederacy
Turning point of the American Civil War. There is widespread disagreement over the turning point of the American Civil War. The idea of a turning point is an event after which most observers would agree that the eventual outcome was inevitable.
https://en.wikipedia.org/wiki/Turning_point_of_the_American_Civil_War
Gettysburg and Vicksburg weren't seen as a turning point until all the fighting was done. Personally, I've always viewed Antietam as more of a turning point. This one handwritten page put a halt to British and French intervention on the side of the South by turning the War as, unquestionably, about slavery.
https://www.quora.com/Why-was-the-Battle-of-Gettysburg-considered-a-turning-point-in-the-American-Civil-War
In most cases, contemporary observers may lack confidence in predicting a turning point. In the Civil War, many of the turning points cited by historians would not have been recognized as such at the time. 1 Confederate victory in First Battle of Bull Run (July 1861)
https://en.wikipedia.org/wiki/Turning_point_of_the_American_Civil_War
The Gettysburg Foundation. Gettysburg History. The Civil War. The American Civil War was a conflict between the United States of America, represented by the Union, and The Confederate States of America, represented by the Confederacy fought between 1861 and 1865.
http://www.gettysburgfoundation.org/35/history-and-relevance
The Battle of Gettysburg has often been referred to as the “High Water Mark of the Rebellion.” Many consider it to be a turning point in the Civil War because the Union victory placed the Confederacy on the defensive and ended Gen. Robert E. Lee’s most ambitious attempt to invade Union territory.
http://www.gettysburgfoundation.org/35/history-and-relevance
Confederates capture a Union battery during the First Battle of Bull Run. There is widespread disagreement over the turning point of the American Civil War. The idea of a turning point is an event after which most observers would agree that the eventual outcome was inevitable.
https://en.wikipedia.org/wiki/Turning_point_of_the_American_Civil_War
Gettysburg was, by American Civil War standards, a massive battle. It's importance should not be downplayed. But it is also just a part of a larger mosaic of the war. There was great interest at the time in its outcome, but I doubt you'd find anyone in 1863 that would have called it a turning-point. I rather think Winston Churchill's quote regarding the Second Battle of El Alamein is an apt description of what was felt: Now this is not the end.
https://www.quora.com/Why-was-the-Battle-of-Gettysburg-considered-a-turning-point-in-the-American-Civil-War
which battle is considered the turning point of the civil war
The Battle of Gettysburg is considered as the turning point of the civil war. The Battle of Gettysburg is considered the turning point of the Civil War.