First Lieutenant is a very common rank in the Army, and is held literally by thousands of service members.
In 1798.
Yes he entered the Army as a First Lieutenant in 1808.
Lieutenant General Walter Krueger was born in Germany and was appointed as the first commander of the US Third Army. His parents brought him to the US in the late 19th century. He joined the US Army and was commissioned as a second lieutenant in 1901. Kruger first saw combat action in WW 1.
Lieutenant Colonel.
Depends which branch of service. In the US Army, Air Force, and Marine Corps there are two Lieutenant ranks - Second Lieutenant (O-1) - which is the lowest commissioned officer rank - and First Lieutenant (O-2), which is the next rank up. Likewise in the Navy and Coast Guard, there are also two Lieutenant ranks - Lieutenant Junior Grade - which is pay grade O-2 and equivalent to a First Lieutenant in any other branch - and Lieutenant - which is pay grade O-3 and equivalent to a Captain in any other branch. After (Navy) Lieutenant comes Lieutenant Commander, which is equivalent to a US Army/Air Force/Marine Corps Major.
Yes.
Lieutenant General Samuel B. M. Young.
The US equivalent to a British Commonwealth (UK, Aus, India, etc.) Flight Lieutenant is Captain (US Army/Air Force/Marines) or Lieutenant (US Navy).
2nd Lt . In the US Army, it's "2LT".
A "Second Lieutenant" in the Army and Air Force element, or a "Sub-Lieutenant" in the Navy.
The commander of a vessel; Captain. The rank of "Commander" is called commander. A "Commander" in the US Navy is equal to a US Army LTC (Lieutenant Colonel-silver oak leaf). A USN Lieutenant Commander is a US Army Major.
General Hodges was honored to be appointed to command the US Third Army in Europe. His handicap was that General Kruger took most of the best officers of the Third Army to join him in the new Sixth Army.