There are tons of reference books, icluding ones from Squadron and Osprey; also check out publications referencing the particular conflicts, e.g., Desert Shield, Desert Storm, Enduring Freedom, Iraqi Freedom, etc.
Here's a short list from memory, in 1/35 plastic, more or less in chronological order. I believe all are currently available.
Tanks: M48A2 and 3, M551, M60A1 and 2, M1 (Many variants)
Other tracked vehicles: M109, M110, many variantions based on the M113, M247, M2/M3, MLRS, M88, LVTP 7.
Wheeled vehicles: M35A1, M151A1 and2, Jeep CJ9 (military), various Marine LAV's, many variations on the HUMVEE, HMMT, MRAP, M1117, several variants of the Stryker.
There are also numerous detail and conversions for theses, allowing you to add PE and/or resin to get a more detailed version of the original kit as well as to upgrade them to varying standards.