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In the US Army, US Air Force and US Marine Corps, a lieutenant colonel is a commissioned officer superior to a major and inferior to a colonel. The rank of lieutenant colonel is comparable to the rank of commander in the US Navy. The insignia for all four positions is a silver oak leaf.
In the British Army and Royal Marines, a lieutenant colonel wears a crown above a pip. The crown has varied in the past with different monarchs; the current one being the Crown of St Edward.