Police Fight Against Drug Traffickers, Illegal Drug Trade, Brazilia

History
Addictive drugs were first prohibited in the late 19th and early 20th centuries. An Illegal Drug Trade emerged. During the 19th century, China retaliated with imports of opium and two Opium Wars broke out. In the First Opium War the Chinese authorities had banned opium but the United Kingdom forced China to allow British merchants to trade opium with the general population. Smoking opium had become common in the 19th century and British merchants increased. Trading in opium was (as it is today in the heroin trade) extremely lucrative. As a result of this illegal trade an estimated two million Chinese people became addicted to the drug. The British Crown (via the treaties of Nanking and Tianjin) took vast sums of money from the Chinese government through this illegal trade which they referred to as "reparations".