Passage: Her reign of 63 years and seven months was longer than that of any of her predecessors and is known as the Victorian era. It was a period of industrial, cultural, political, scientific, and military change within the United Kingdom, and was marked by a great expansion of the British Empire. She was the last British monarch of the House of Hanover. Her son and successor, Edward VII, initiated the House of Saxe-Coburg and Gotha, the line of his father.

Question: What area expanded in the Victorian era?
British Empire