Sea in culture of barbarian invaders and knowledge of geography took a backward step. In the seventh century, Isidore of Seville produced a "wheel map" in which Asia, Africa and Europe were arranged like segments in an orange, separated by the "Mare Mediterranean", "Nilus" and "Tanais" and surrounded by "Oceanus". It was not until the fifteenth century that Ptolemy's maps were used again and Henry the Navigator of Portugal initiated ocean exploration and maritime research. Encouraged by him, Portuguese navigators explored, mapped and charted the west coast of Africa and the Eastern Atlantic and this knowledge prepared the way for the great voyages
United States Marine Forces Europe and Africa heavy armored vehicles to NALMEB for the first time. As of January 2017, a rotational force of about 330 (infantry) U.S. Marines from Camp Lejeune, NC, are stationed in Trondheim, Norway on two six-month deployments. United States Marine Forces Europe and Africa Marine Corps Forces Europe and Africa (abbreviated as MARFOREUR/AF), headquartered in Panzer Kaserne-Barracks in Böblingen, Germany, is the U.S. Marine Corps component of the U.S. European Command and U.S. Africa Command. In February 1980 the Commandant of the Marine Corps and the Chief of Naval Operations revised the operational task sharing between the two branches in a memorandum.