Doesn't seem too out of the ordinary. NATO did a similar thing a few years back on the Russian border. It's basically a mixture of sabre-rattling and getting the cobwebs out of the military in terms of logistics, planning and communication.
"The groups cover everything from munition shortages to the resilience of society, including whether citizens are “ready to accept the level of casualties we have never seen since world war two”, says one participant."
…isn't at all what "NATO did" in any of its training maneuvers.