WILLIAM L. LANGER Expert on 19th Century Diplomacy Want to keep up with breaking news? Subscribe to our email newsletter. The Harvard Crimson The University Daily, Est. 1873 ...

here is a look back at some major trade wars since the 19th century: – 19th century Opium Wars – In the mid-19th century, two conflicts over the opium trade, which became known as the Opium ...