I recommend this article from the LA Times, which discusses the life and death of Colonel Ted Westhusing. Colonel Westhusing graduated third in his class from West Point, and is described in the article thus:

Westhusing, 44, was no ordinary officer. He was one of the Army’s leading scholars of military ethics, a full professor at West Point who volunteered to serve in Iraq to be able to better teach his students. He had a doctorate in philosophy; his dissertation was an extended meditation on the meaning of honor.

With one month left to go in his tour in Iraq, Westhusing committed suicide.

The details of how this honorable man came to feel so violated in Iraq that death was preferable to the dishonor he felt there are discussed in the article.

No war is “good.” Reasonable people can argue that some are justified or necessary.

Iraq is not one of them.