A forced movement of people, on foot, in such circumstances that many die during the journey.
Synonym of dead march (“mournful music for a funeral etc.”)
A project that requires a stretch of unsustainable overwork, or whose participants feel it is destined to fail.
A movement on foot by soldiers or prisoners of war, who must, in order to satisfy a military requirement, travel at a speed or in adverse conditions that would normally tire them excessively.