I'm not sure the argument he makes is fully flushed out, but there's good information in this opinion, making it worthwhile from that standpoint alone.

An ardent cheerleader for the insane US/UK invasion of Iraq, Fred Kagan tries to rally support for the failing US/UK Afghan war. It does not seem to occur to the author that US military activities in Afghanistan have made the security situation worse in both Afghanistan and Palistan. Kagan argues for "winning" the war, when even the president of Afghanistan says bringing in more US troops will not improve the security situation. Kagan apparently has given no thought as to why the US is leading the effort in Afghanistan when this country clearly is not well suited to waging long-term military campaigns in Muslim countries.