what did the north use to limit south's trade
Union blockade The Union blockade in the American Civil War was a naval strategy by the United States to prevent the Confederacy from trading.
Union (American Civil War) In 1860 the Treasury was a small operation that funded the small-scale operations of the government through land sales and customs based on a low tariff.[54] Peacetime revenues were trivial in comparison with the cost of a full-scale war but the Treasury Department under Secretary Salmon P. Chase showed unusual ingenuity in financing the war without crippling the economy.[55] Many new taxes were imposed and always with a patriotic theme comparing the financial sacrifice to the sacrifices of life and limb. The government paid for supplies in real money, which encouraged people to sell to the government regardless of their politics. By contrast the Confederacy gave paper promissory notes when it seized property, so that even loyal Confederates would hide their horses and mules rather than sell them for dubious paper. Overall the Northern financial system was highly successful in raising money and turning patriotism into profit, while the Confederate system impoverished its patriots.[56]