This article on the Rwandan genocide came out in FOREIGN AFFAIRS in 2000,n and I used it in my thesis. Kupperman argued in this article the extreme logistical and other difficulties which the US and UN would've faced in mounting a humanitarian intervention into Rwanda during 1994, such that the US would've needed to deploy at least 3 divs (possibly the 101st, 82nd and a light inf or Marine outfit) with full all-arms and aviation support into central Africa, and that best case scenario they could only have hoped to have saved around approx 125,000 of the 500,000-800,000 ppl who were butchered by the Hutu extremists. Thus, he seriously attacks Gen Romeo Dallaire's assertion that with 5000 fully-equipped combat troops and a mandate to militarily halt the genocide, he could've stopped the mass killers in their tracks.