James Dunnigan of Strategy Page summarized the American deaths per 1,000 deployed troops. So far in Iraq, the US military is suffering about 3.6 deaths per 1,000 deployed troops. Here are the numbers, by year, from our war in Vietnam:
We are suffering a much higher wounded:killed ratio in Iraq than we did in Vietnam, mostly due to improved body armor and medical capabilities, so the total number of casualties is higher relative to Vietnam than deaths are. It would be interesting to see a comparison of those numbers.
Go read Dunnigan’s whole article.