Seconding this gentlepreferredgenders answer. Logistics is normally easy: don’t send soldiers past your logistical reach. The extent of this reach is what determines an armys capacity for offensive maneuvers.

One side of US military is its capacity to project power all around the world, and support that through its logistics apparatus. Few countries can project power in the same way (France and UK, mainly. And to an extent Indonesia).

Russia has its military, including the logistics portion, based around rail transport (For example, the IS10 tank was a good tank for its time, but couldn’t be transported very easily like the lighter tanks could, which is one of the factors that lead to USSR shifting her strategy away from heavy tanks). Having a logistics network based on rail makes sense from a defensive perspective, but run into problems when on the offensive - now you have to secure rail infrastructure to expand the logistical network as you go, as well as keep it maintained and not sabotaged. this is resource intensive when dealing with insurgencies.

And even if you get decent control of a decent rail network, then the issue becomes delivering that last mile - in theory easy, but you need logistics hubs that can offload trains and load stuff onto trucks. Even after russia got (some of their) shit together, this was a bottleneck that was struck by himars several times, and videos have shown that even the unexploded logistics hubs are highly inefficient, because for reasons I cannot understand, a lot of the goods aren’t stacked on standardized pallets that are easily moved by forklift. Instead you see things such as offloading a truckfull of landmines (probably without their detonators in) the same way you would a pile of gravel; tip the flatbed, and let everything slide off onto the ground, ready to be moved by hand.

Source: i used to be in army logistics. And I like trains.