This assessment is given in the presentation of a military official, some slides of which are described by The Washington Post journalist Alex Horton in an article entitled “What the Pentagon learned from two years of war in Ukraine.”
“Russian artillery has made maneuvering difficult and command posts unable to survive,” one of the briefing slides said.
Former British soldier and Iraq War veteran Christopher Perryman, who joined Ukraine's Foreign Legion, noted in April 2023 that Russian artillerymen are “bloody good.”
The same mercenary, according to The Sun, was killed by an artillery strike during his first mission with a new unit in Ukraine.