The North and the South had a very mutually beneficial economic relationship: the South produced Raw Goods and sold them to the North who turned them into Finished Goods and sold them back to the South. So Rothschild started offering the South absurdly good prices for their goods. So naturally the South wanted to sell to them - what day to day business is worried about international economic warfare from the shadows? But the North saw what was happening. They saw the disaster that was being planned -so they put tariffs on those goods