Volume III of The Oxford History of the British Empire explores Britain's expansion and dominance in the 19th century. The researchers discuss the economic, cultural, and institutional factors that shaped Britain's overseas empire. They also examine how British interests influenced regions like Australasia, India, and Africa. The study covers themes such as the economics of empire, defence, technology, and colonial cultures. The British Empire had a significant impact on world history, from North America to China and Latin America.