King Charles' first Trooping the Colour celebrations will be capped off with a 41-gun salute in Green Park. But what is the origin of the tradition?
King Charles arrives on horseback to his first birthday parade.
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King Charles III - latest news, pictures and updates on His
King Charles III - latest news, pictures and updates on His
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Why do we have gun salutes? Tradition that dates back to the 15th
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