True.
The battle of Gettysburg was the turning point of the civil war because the Union Victory placed the Confederacy on the defensive and ended General Robert E. Lee ambitious attempt to invade Union Territory. The Confederates never again reached the military strength they held at Gettysburg. General Lee never fully recovered .
The invading confederate army withdrew back to the South. On this day , the Union forces lost 23,000 men while the Confederates lost 25,000 men.
The civil war raged on for another two years until the formal surrender of General Lee's army of Northern Virginia in April 1865.