In the history of the United Kingdom and the British Empire, the Victorian era was the reign of Queen Victoria, from 20 June 1837 until her death on 22 January 1901, although slightly different definitions are sometimes used. The era followed the Georgian era and preceded the Edwardian era, and its later half overlaps with the first part of the Belle Époque era of continental Europe.
Various liberalising political reforms took place in the UK, including expanding the electoral franchise. The Great Famine caused mass death in Ireland in the mid 1840s. Britain had peaceful relations with the other great powers. It participated in various military threats and conflicts mainly against minor powers. The Crimean War of the 1850s was against Russia. Russia was seen as a major threat to the UK's Ottoman ally as well as to India. The British Empire expanded during this period and the Royal Navy was predominant in power in the world.