"Losing a tank track is like having a bicycle chain break. It stops the vehicle from moving, but is fairly easy to repair. If spare track segments are available, the tank crew can replace it in an hour or so. This is impossible when you are under fire, but an armored recovery vehicle can tow the tank back to safety. Russian engineers have the BREM-1M T-90 recovery vehicle for exactly this job — but it has to get there before the demolition drones."