The turning point in the American Civil War is widely considered to be the Battle of Gettysburg, fought from July 1 to July 3, 1863. This major conflict marked the last significant Confederate invasion of the North and resulted in a decisive Union victory. Additionally, the Siege of Vicksburg, culminating on July 4, 1863, further exemplified a strategic shift, granting the Union control of the Mississippi River. Both battles shifted the momentum toward the Union, ultimately contributing to Confederate decline and solidifying the resolve of the Northern states to continue fighting until the war's conclusion.