The two opium wars were between china and

China (Qing Dynasty) and the British Empire

Explanation:

The opium wars were two wars that took place in the middle of the 19th century. The wars were between China, with the Manchurian Qing Dynasty as its leader, and the British Empire. The opium wars got their name because basically the wars were waged because of the opium trade. The British wanted to impose the opium on China through trade, and the Chinese of course did not wanted that to happen, so they went to war. The British turned out as the victorious side in this wars, and that had huge negative impact for around a century on the Chinese development and economy.

cultural history is your answer

i believe it would be a single seller : )