The Global Policy Forum maintains a valuable collection of articles on the Iraq conflict. Written by experts and reduced to manageable excerpts, these materials provide a useful introduction to the complex issues behind this conflict.

This site provides useful information on Iran and a particularly strong set of articles on Iran's history. It's sponsored by the Iran Chamber Society, so should be read with that in mind.

National Public Radio has put together a useful five part article-series on the Sunni-Shiite schism. 

This site, posted by East Carolina University, provides dozens of useful links for studying the war in Afghanistan.