HOW THEY FIGHT...

Who armed the insurgents in Iraq? We did! Read this Washngton Post story on how we failed to secure millions of tons of ammunition in Iraq, ammunition that the insurgents are using to create those devastating IEDs that are killing our soldiers and feeding the insurrection GAO Faults U.S. Military Over Munitions in Iraq
Report Says Insurgents Took Unsecured Explosives

Let me start you off:

The U.S. military's faulty war plans and insufficient troops in Iraq left thousands and possibly millions of tons of conventional munitions unsecured or in the hands of insurgent groups after the 2003 invasion -- allowing widespread looting of weapons and explosives used to make roadside bombs that cause the bulk of U.S. casualties, according to a government report released yesterday.

Some weapons sites remained vulnerable as recently as October 2006, according to the Government Accountability Office report, which said the unguarded sites "will likely continue to support terrorist attacks throughout the region." For example, it said hundreds of tons of explosives at the Al Qa Qaa facility in Iraq that had been documented by the International Atomic Energy Agency were lost to theft and looting after April 9, 2003.