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.
Trading post The annexation of trading posts along ancient trade routes took place in the 16th and 17th century by European powers like the Dutch and English. It began with the capture of Ceuta (a terminus of the trans-Saharan trade route) by the Portuguese in 1415. They went on to establish further enclaves as they explored the coasts of Africa, Arabia, India and South East Asia in search of the source of the lucrative spice trade. Trading posts were also very common in the early settlements of Canada and the United States for the trade of such things as fur. They were also used in many camps across the United States as places to buy snacks, items and souvenirs.