China:The Opium Wars

The Opium Wars was the very first drug war started by thee Europeans. This drug war made China's economy weaken. Soon China began to tell off the Europeans to stop selling Opium to their people. Of Course the Europeans ignored them and continued selling the addicting drugs by using privately own vessels. The Europeans bringing the Opium ended up making a huge profit off of the growing number of chinese addicts, but not until 1838 did they start making serious efforts to prevent opium smoking.
The Opium wars was of course fought over Opium, which is gathered from poppy seeds that come from the poppy flower. You boil down the seeds to create opium. The British Won the war with their supperior technology and China was forced to sign a peace treaty. This was, of course, one of the first of many "unequal treaties" with the west.