Show Greatest Greated War Var Explosion The greatest single explosion In the World war took tool place on Messines Ridge In Belgium at nt a. a a m m. m on June 7 1017 1917 when 10 19 British mines containing more than a million pounds of or ammonal were fired simultaneously under German trenches blowing high hl h hIn In the air a n long line of concrete em em- emplacements emplacements emplacements placements guns and soldiers H. soldiers H. H D. D Trounce San Diego Calif In Colliers Collier's Weekly |