That actually leads into some discussions in comments about the general horrors and mass slaughter of WWI, which was notable both for widespread and mass industry supply of weapons, advances in those weapons themselves to allow maximum killing — and tactical / logistical issues that required mass troop charges (no radios to coordinate small unit actions) against significant defender advantages (rail lines to resupply, while the attackers had no such things as trucks and jeeps to get more ammo, etc. from). (Good comment about this all here http://goo.gl/gihe1x)
This giant flamethrower was the most terrifying weapon of World War I
You’re looking at a Livens Large Gallery Flame Projector in action, the mother and father of all flamethrowers, capable of torching everything as far as 100 to 130 feet away (30 to 40 meters.) They were deployed for the first time in World War I by the British Army, and apparently they were quite effective.