The document discusses Britain gaining an empire in the 19th century. It mentions the Great Exhibition of 1851 which showcased Britain's technological achievements and had over 13,000 exhibits. This exhibition was important for Britain as it demonstrated its industrial prowess. Having an empire expanded Britain's trade and imports/exports as seen by the graph of British trade from 1740-1900. Britain gained its empire through colonization, military conquest, occupation, and diplomacy. Some opposed having an empire due to the costs and moral issues with colonization.