Temperatures in eastern Ukraine have been well below freezing in recent days, hardening the ground and opening a window for potential winter offensives by both sides.

But such pushes may not come, either now or during a more sustained cold spell.

Military analysts within and outside Ukraine say that while the shift from muddy to frozen terrain is important in enabling the use of wheeled combat and support vehicles, it’s just one of many factors commanders would consider before risking a major new assault.