The Battle Lines: Letters from American Wars Gilder Lehrman Institute of American History
You should know us well enough by now to guess that no simple collection of letters would make this column. So what does this one do to make the list?

Audio! Each of thirty-some letters are read aloud. With a cool viewer that lets you see both the original handwriting and a typed copy. The currators organize them by simple topic: Enlisting, Comforts of Home, Love, Combat. So far. You can also sign up for the next installment.

This feature is part of the Guilder Lehrman collection, a wonderful resource for developers. And its all found at the address of yesterday's interactive, HistoryNow.org