What motivated some nations to build overseas empires during imperialism

A driving force behind imperialism was the desire for access to new markets in which to sell goods. This British propaganda poster boasts that Africa would become a gold mine for British-made products. Britain's sense of national pride and aggressive foreign policy during this period came to be known as jingoism.

Battle of the Monitor and Merrimack, also called Battle of Hampton Roads, (March 9, 1862), in the American Civil War, naval engagement at Hampton Roads, Virginia, a harbour at the mouth of the James River, notable as history's first duel between ironclad warships and the beginning of a new era of naval warfare.