I've been reading some papers on military logistics and wondering how important are some of the limitations mentioned. On railways: was it common for steam engine locomotives to require protection overnight and very frequent maintenance? And to be tied to specific stretches of railway? OR was this a feature of some climates or some regions? On road transport: rather small limits to the amount of cargo that could be moved long distances even with trucks. Are these reasonable? And what are the present day limits of road transport on hostile (or deserted) territory? On pre-modern and early modern armies: living off the land was common. Still, provisions get spent on any given region if an army remains there too long, and there is such a thing as a scorched earth strategy. Was it common for cavalry to be regarded as a hindrance due to its supply requirements and armies that could posses cavalry to deliberately operate without horses? Or even for cavalry soldiers to campaign dismounted, as foot soldiers?