Individual shells probably aren't that powerful but there are also absolutely huge explosives at the end of tunnels which were intended to be exploded and destr

Individual shells probably aren't that powerful but there are also absolutely huge explosives at the end of tunnels which were intended to be exploded and destroy enemy trenches. Googling brings up this article about a 50,000lb tunnel bomb under a field in Belgium: http://rense.com/general47/50000lbWW1bomb.htm http://rense.com/general47/50000lbWW1bomb.htm