Reminds me of that joke.
Question: Why did the Mexican Army only have 500 men at the Alamo?
Answer: They only had two cars.
I was reading an excellent book some time back called “No True Glory” about the USMC battle in Fallujah, and they talked about how the insurgents made signals with fires and tactically (although they didn’t appear to really understand tactics, generally) moved men around in cars.