Let one of Britain's most compelling public historians, David Olusoga, take you through some of history's influential weapons - the firearms that helped to shape wars, empires and society itself. David unpacks the human stories behind four guns and the impact they've had on the world: The infamous Tommy Gun which became a symbol of American gangsters; The Maxim gun which killed millions in WWI and is still used today; The Brown Bess flintlock musket which helped Britain rule an empire, and the Lee-Enfield rifle which has seen many wars around the world since the late 1800s.