That was a helpful link, Erudite.
After the Crimean War, which he inherited, Alexander used Russia's defeat to began reforming the military and extended the draft to include not only serfs but all of Russia's sons no matter what class. That system of universal military conscription basically remains intact to this day.
Up thru WWI Russia was one of the last country's to modernize battlefront medicine. It was common for families to be responsible for care of the wounded and not that unusual for female and older male family members to be camped not from the battlefront in order to care for their wounded sons. While moderization of battlefield medicine began in WWI, only in WWII did Russia fully implement modern medicine to the battlefield and with it the universal policy of removal of the wounded via ambulance train back to Russia's interior.
You can see hints of this in the movie Dr Zhivago. The main character, Yuri Zhivago, was a army doctor at the WWI battlefront but many of his battlefield assistants and nurses were volunteer family members. If you recall, Lara his love had been serving as a nurse while searching for her husband Antipov.
The principles of evacuation from the trenches to advanced dressing stations, roles of the battalion medical officers, field ambulances, casualty clearing stations, stationary hospitals, ambulance trains and hospital ships were adapted by Russia in mid/late WWI from the allied British models. Not that none of those had been in existence previously, but nowhere near the standard of the civilized world up to that time in history.