Here’s a link to a very interesting article in the IEEE Spectrum on asymmetric warfare, explaining how our military focus on technology was crucial for success in the Cold War and Gulf War I but may have led to the wrong conclusions in fighting low-tech asymmetric opponents in Vietnam and Iraq.
At the end the author gives an interesting, but fairly technical explanation of Lanchester’s Laws. I enjoy a good differential equation model as much as anyone, but follow this link for a less technical explanation.