Images

A photograph showing British Army soldiers wearing PH Type helmets as protection against poisonous gas at the First Battle of the Somme during the First World War (1914-18). (Imperial War Museums)

A 1919 oil-on-canvas painting titled Gasssed by John Singer Sargent. The work shows British soldiers blinded by a gas attack during the First World War (1914-18). (Imperial War Museums)

A United States official poster informing people what to do in case of a poison gas attack during the First World War (1914-18). Imperial War Museums, London.

A line of British soldiers injured during a German tear gas attack at the Battle of Estaires in April 1918 during the First World War (1914-18). (Imperial War Museums)

Portrait of William Pepperrell, oil on canvas painting by John Smibert, 1746. Pepperrell (1696-1759) led the colonial troops that captured the fortress of Louisbourg in 1745 during King George's War. He was made a baronet for his victory...

A View of the Landing the New England Forces in ye Expedition Against Cape Breton, coloured line engraving by Brooks after J. Stevens, 1747. Depicted here is a scene from the Siege of Louisbourg of 1745, a major battle in King George's War...

The Star Spangled Banner, painting by Percy Moran, c.1913. This painting shows Francis Scott Key standing on a ship whilst pointing at the US flag over Fort McHenry during the Battle of Baltimore in 1814. His poem about the British bombardment...

Susanna Dickinson (c. 1814-1883), the "Messenger of the Alamo." Photo from McArdle collection at Texas State Library & Archives Commission. Date: Nineteenth century Photographer: Texas State Library & Archives Commission.

A map of the German invasion of Poland in 1939 which marked the beginning of the Second World War (1939–1945). The campaign demonstrated the devastating effectiveness of Blitzkrieg, a new form of fast, coordinated warfare combining armor...

Ancient Greek neck amphora, from the Etruscan city of Vulci in the modern-day Lazio region of Italy, 510-500 BCE. Theseus, standing to the right, wears a richly patterned tunic and a lion's skin. In a decisive moment, he leans in, restraining...