Break the cycle.

At 7:20 a.m. on July 1, 1916, British forces detonated a huge underground mine that had been laid deep beneath a German army fortification in northeastern France known as the Hawthorn Ridge Redoubt. The deafening explosion shook the ground.

A large, dark cloud of smoke and soil rose from the hill and filled the air. Stones showered down on the surroun…