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Britain's Queen Elizabeth on Saturday (June 28) attended a ceremony in London to remember those who volunteered for duty in the First World War.
The service, which the British monarch attended with her husband, the Duke of Edinburgh, took place on the 100th anniversary of the assassination of the heir to the Austro-Hungarian throne.
The Archduke Franz Ferdinand was shot dead in Sarajevo in June 1914, lighting the fuse for the First World War.
The London ceremony took place at the Royal Chelsea Hospital, which is the home of retired British Army soldiers.
The Chelsea Pensioners, as they are known, wear distinctive scarlet uniforms and tricorner hats and are a colorful addition to nearly every highlight of the British summer season from Ascot to Wimbledon.
Saturday's event took place during Britain's Armed Forces Day.
Some 2.6 million people volunteered from the United Kingdom during World War One and some 1.5 mi
