The document summarizes the First Opium War between Britain and China from 1839 to 1842. It describes how the war was caused by conflicting views on trade, diplomacy, and justice between the two nations. Specifically, Britain exported large amounts of opium from India to China for profit, which Chinese officials wanted to control as the drug spread. When Chinese officials confiscated British opium supplies, Britain militarily forced China to submit to protect its lucrative opium trade.