War in Ukraine
At the start of the 2022 invasion, Russia was able to use its professional troops to conduct complicated military operations - explains Samuel Cranny-Evans of the Royal United Services Institute (Rusi). But a lot of those experienced soldiers are now likely to be dead or wounded, says the defence analyst, and have been replaced by people with little training or military experience - such as volunteers, civilians and prisoners. These people can't do what professional soldiers can do, explains Mr Cranny-Evans. "This means they have to do things that are a lot simpler tactically - which generally seems to be a forward assault onto Ukrainian positions with artillery support."
