Images

A photograph of a British Mark IV tank, used during the First World War (1914-18). (Imperial War Museums)

A photograph of a Rolls-Royce armoured car in the Middle East campaign during the First World War (1914-18). Imperial War Museums, London.

A 1918 British poster to raise funds for weapons during the First World War (1914-18). (Imperial War Museums)

A 1916 photograph of a British 18-pounder artillery gun on the Western Front during the First World War (1914-18). (Imperial War Museums)

A Lee-Enfield bolt-action rifle with bayonet attached, the standard weapon for British Army soldiers on the Western Front during the First World War (1914-18). Imperial War Museums, London.

A 1918 photograph of British soldiers on the Western Front using a Lewis machine-gun during the First World War (1914-18). (Imperial War Museums)

A photograph of a single-seater Sopwith Camel biplane, one of the most successful fighters in the First World War (1914-18). Imperial War Museums, London.

Statue of Moses Austin, City Hall Plaza, San Antonio, Texas. Photo by Carol M. Highsmith, 2014. Father of Stephen F. Austin, the "Father of Texas", Moses initiated the settlement of the region that would be completed by...

Stephen F. Austin grave monument at Texas State Cemetery in Austin, Texas. Photograph by Billy Hathorn, 2013.

The Achaemenid Persian Empire emerged in the mid-6th century BCE when Cyrus II (reign 559–530 BCE) united the Persian tribes and overthrew the Median kingdom (c. 550 BCE), establishing a new imperial state...