What strategies and advantages for the North are good and how are they helping their side?

Some advantages are that they have a lot of factories in the North and can make weapons a lot faster in preperation for the Civil War

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

the court ruled that a state law that banned abortions (except to save the life of the mother) was unconstitutional

hope this : )