revolution, industry, and Empire.
Basically the Opium War was caused when the imperialist nations wanted the good things from China such as Silk, and spices. But they didn't want to pay too much and had difficulty finding products the Chinese would want to buy. So their ships would be full in both directions.
They were very pressured by our nation such as the usa's powerful army.
The Meiji area was a very peaceful place but it was destroyed. It has been restored to a very peaceful society and extremely resottrized and modern city and area.