Union soldiers were fighting for the freedom of slaves and reuniting the states. Confederate soldiers fought for protecting the confederacy. Yes, it did change over the war.
Answer:
the transcontinental railroads were built all around the US and were used for trade and to transport goods all over the place
The strategy that they did after the losing battle at Saratoga is to stay near the coast, south rally loyalists. They also threatened then surrender, It was greatly challenged by the entry of France into the War. They opened fronts in some parts of the world and they draw the troops away from the conflict.
