Between which two countries was the "First Opium War"?

ChewyGazelle68623, here here is a fun drug fact ~the German company by the name of Bayer came up with Heroin as a cure for opiate abuse.

Hong Kong was acquired by the British as a result of this war. It was returned in 1997. The British were unscrupulous and immoral drug pushers.

Some 90 percent of young men along the coast of China were addicted to opium.

just got to have that opium!!