https://en.wikipedia.org/wiki/List_...ducated_at_the_United_States_Military_Academy
Obviously anyone before your POD and anyone enrolled during it; all your principles from the Civil War are more or less involved, so your Lee, Scott, Meade, Sherman, Hancock, Johnston, Beauregard, Grant, etc. are all there. You'll also have a couple of older guys who didn't quite make it to 1861; Commodore Matthew C. Perry comes to mind along with Commodore David Conner. These will be your guys your this war, as both were decorated naval commanders and both engineered the amphibious assault on Veracruz in 1847, experience that will prove crucial for Cuba and the other Spanish islands. Depending on your POD, Franklin Pierce may also be called into service for the US. Some other guys that come to mind aside from the Civil War generation (and others who served, like John Wool) are Generals David Twiggs, Quartermaster General Thomas Jesup, and Commodore Stockton. John C. Fremont is also around.