Answer:
The right answers are:
1. Gettysburg 2. Vicksburg.
Explanation:
1. Gettysburg, July 1-3, 1863.
The crushing defeat suffered by the Confederate army of Gen. Robert E. Lee in Gettysburg, Pennsylvania, forced his retreat to Virginia from Northern territory and the failure of his threat to the North. The South was never to regain the strategic initiative, from that day on, Southern armies fought on the defensive.
2. Vicksburg, July 4, 1863.
The surrender of Confederate troops at Vicksburg supposed a heavy strategic blow for the Southern army and a major victory for the Union. The fortress of Vicksburg was the key to the control of the Mississippi River and the Mississippi Valley, a major route for food and supplies and the smuggling of weapons to evade the Northern blockade. After the fall of this strategic position, the South laid open for conquest.
