Israel’s fight against Hamas has moved into a nasty phase. It’s a slow, arduous process of digging Hamas out of the many miles of tunnels they have dug over the past 16 years. One that the Israelis found recently was more than two miles long and wide enough to drive a vehicle through. It had facilities that would allow Hamas fighters to live for an extended period of time underground.

Tunnels have been used many times and in many places in defensive warfare. The Marines encountered extensive tunnel systems when they landed at various islandsduring WWII. These Islands had a lot of caves and Japanese troops had expanded these with and extensive system of tunnels. Taking shelter in these allowed Japanese troops to take shelter from pre-assault Naval gunfire and air bombardments. It also allowed Japanese troops to pop out at unexpected locations.