The British East India Company pursued a monopoly on production and export of opium in India after Britain conquered Bengal in the Battle of Plassey in 1757.

• 英国东印度公司在1757年的普拉赛战役（也就是克莱武徒手洗劫孟加拉国库的那次战役）之后，垄断了整个印度的鸦片出口。