Lieutenant, a commissioned officer. In the United States Army, Air Force, and Marine Corps, lieutenants are the lowest-ranking commissioned officers. There are two grades, second lieutenant (the lower) and first lieutenant. In the Navy and Coast Guard, lieutenants rank above ensigns and below lieutenant commanders. Lieutenant junior grade is equivalent to an Army first lieutenant, and lieutenant is equivalent to an Army captain Originally the term lieutenant referred to any official, civil or military, who took the place of a superior.
The Messerschmitt Bf 109 is one of few fighters ever to be developed from a light-plane design. Willy Messerschmitt's angular little plane was built in greater numbers than any other fighter. Read how the Bf 109 has been so successful and long-lived.
Legion, the basic infantry unit of the Roman army. Legions were originally small groups of armed citizens sent to deal with threats to the city.