Answer 1:
The South also claimed as its own some southern areas of the Arizona territory (which included parts of what are now Arizona and New Mexico). By the end of the war, the Union comprised 25 states, and the Confederacy had only 11.
Answer 2: The union had many advantages over the Confederacy. The North had a larger population that the South.
Answer 3: Why? The union also had an industrial economy, where as the Confederacy had an economy based on agriculture. the union had most natural resources like coal, iron, and gold, and also a well-developed rail system.