There's a theory about the M4 that it wasn't really any more reliable than any other tank of the period. But it's ease of repair meant that the operational read

There's a theory about the M4 that it wasn't really any more reliable than any other tank of the period. But it's ease of repair meant that the operational readiness was pretty close to 100%. https://youtu.be/udnEpV160zU?t=7m10s https://youtu.be/udnEpV160zU?t=7m10s