This thread's got enough books in it to make one hell of a reading list!

Other books I've liked a lot:
"The Rising Sun" by John Toland (World War 2/Pacific)
"We Were Soldiers Once and Young" by Lt. Gen. Harold Moore with Joseph Galloway (The battle of the Ia Drang Valley)
"The Killer Angels" by Michael Shaara,

an absolutely fabulous historical novel about the battle of Gettysburg that won a Pulitzer Prize, and most deservedly so. I've read it three times. A true masterpiece.