They'd never try this in Hollywood.

[ordnance11]

Summation:

Five years ago, a relatively unknown (and
unhinged) director began one of the wildest experiments in film history.
Armed with total creative control, he invaded a Ukrainian city,
marshaled a cast of thousands and thousands, and constructed a
totalitarian society in which the cameras are always rolling and the
actors never go home

Link to the article
It's been ongoing for 5 years now. The closest American director to do something like this would be Apocalypse Now..a mere 238 days. Francis Ford Coppola was a tyro compared to this director.
__________________
Into terror!,  Into valour!
Charge ahead! No! Never turn
Yes, it's into the fire we fly
And the devil will burn!
- Scarlett Pimpernell