At the start of the battle of Gettysburg, the union army

a. drove the confederates out of Pennsylvania

b. was forced into a defensive position

c. broke through the confederate army's line

D. fought the confederate army to a stand off

The confeds drove the union into a defensive position ya heard, but after realizing the union's power level was too strong, general lee and the rest of his Confederate squad was like "oh naw b" and they retreated, leaving the union still standing. (so the answer is B. papi)