Well I think that depends.
For example if the soles were pegged on..., they would need regular wax/oil to keep the pegs swelled. So they probably did grease up the bottoms to keep the moisture from seeping through AND to keep it from coming in the sewn portions when sewn.
Explains why soldiers often had hobnails, to save the leather from wear from friction with the ground AND to give them some traction.
LD
For example if the soles were pegged on..., they would need regular wax/oil to keep the pegs swelled. So they probably did grease up the bottoms to keep the moisture from seeping through AND to keep it from coming in the sewn portions when sewn.
Explains why soldiers often had hobnails, to save the leather from wear from friction with the ground AND to give them some traction.
LD