In the US Army, Air Force and Marine Corps, a commissioned officer superior to a captain and inferior to a colonel. The equivalent rank in the US Navy is Lieutenant Commander[?]. The insignia for all four positions is a gold oak leaf.
... - ancient Egyptian who travelled along the Red Sea to a land called Punt
Sven Hedin[?], (1865-1952), explorer
Bjarni Herjulfsson[?] - Viking discoverer of North ...