The highest rank in the Army and Marines is a four-star General, a.k.a. Chief-of-Staff of the Army or Chief-of-Staff of the Marines. These men can make between $200,000 and $350,000 a year depending on branch too. In the Army and Marines the ranks follow;
5 star General - (discontinued after the Vietnam War) - (a.k.a.
General of the United States Army)
4 star-General - (Commonly used today)
3 star-Lieutenant General
2 star-Major General
1 star-Brigadier General
(Eagle) insignia - Colonel (silver in color)
(Silver leaf) - Lieutenant Colonel
(Gold leaf) - Major
(2 silver bars) - Captain
(1 silver bar) - 1st Lieutenant
(1 gold bar) - 2nd Lieutenant
These ranks correspond to both the Army and Marines.
Go to Wikipedia to get the NCO ranks which differ.
In the Navy, the ranks follow;
5 star-Fleet Admiral
3 star-Vice Admiral
2 star-Rear Admiral (Upper Half)
1 star-Rear Admiral (Lower Half)
(Gold Leaf)-Lieutenant Commander
(2 silver bars)-Lieutenant
(1 silver bar)-Lieutenant (Junior Grade)
(1 gold bar)-Ensign
See Wikipedia for NCO ranks.
The ranks of the US Air Force are similar in their commissioned officer ranks to the Army and Marines, but their NCO ranks are quite different. See the below link for details: http://en.wikipedia.org.