To give a bit more reference on the scale of the slaughter of Verdun and WW1 in general:
Total casualties for the 1916 battle were ~755,000, maybe less. The battle lasted 302 days, from 21 Feb to 18 Dec. Doing a bit of math, you arrive at just shy of two casualties per minute.
That comes out to crashing a fully loaded 737 jet into the ground every 2 hours, every day, every night, for 300 days straight.
The total casualties of WW1 are worse. In terms of 737-crashes, it comes out to one every ~14 minutes for the ~4.25 years of the war for military casualties. Including civilian casualties you get a 737 plane crash every ~10 minutes for the four years, three months, and two weeks of the war.
Imagine a Lion Air Flight 610 tragedy every 10 minutes, 132 times a day, every single day, every single night, for over 4 years straight. No breaks.
Just building plane after plane, fueling them, training pilots, finding people, getting them on the plane, taxiing, taking off, getting to altitude, and then intentionally running them into the ground, every ten minutes, for 4 years, nonstop.
Where would you even find a place to put all the wreckage? What airstrip's tarmac could support that many planes taking off that quickly? How could you even get that many willing people onto planes at that rate? What kind of airport fuel system could support that amount of consumption for 4 years without maintenance? How could you possible train pilots that fast?
The sheer scale of the slaughter in WW1 is just mind boggling. It truly, really, does make my just head go 'fpoooom!'.
EDIT: I'm having some trouble with my math (maybe?), if someone could double check, that would be great.