During the 18th century, grenadiers were a type of soldier who were typically chosen for their height, strength, and courage. They were often elite troops within their respective units and were distinguished by their mitre caps. British, Swedish, Russian grenadiers used to wear a tall mitre.
In some cases, grenadiers also wore shorter versions of the mitre cap, which were sometimes referred to as "cap grenades" or "grenade caps." These caps were still cylindrical in shape but were much shorter than the tall mitres worn by other grenadiers. This is the case of Spanish, Duth, Prussian and other countries.
Overall, the grenadier mitre cap was an important symbol of status and prestige within the military during the 18th century, and it continues to be an iconic image of this period in history.
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