I am experiencing difficulties in completing my family tree on my great-grandfather's branch (to whom I owe my surname) and was wondering if anyone had information or tips on how to proceed.
Guerrino Costante BUSOLIN, my great-grandfather, was born on the 8th of September, 1892 in Cimadolmo, in Treviso province. He married Oliva BONOTTO in 1922 before emigrating to southwestern France. His marriage certificate lists his parents as Paolo BUSOLIN and Marina BELLUSSI, who were already deceased (so somewhere between 1892 and 1922) and who lived in Cimadolmo.
This is all I know about my great-grandfather and his parents, I would like to know more but I have the following problems:
1. The Stato Civile of Treviso only provides acts dating from Napoleon
2. FamilySearch has no acts for Cimadolmo
I have no way of knowing if this absence of acts is due to incomplete uploading of information or physical destruction of archives (we are after all on the Piave front of WWI!). I've noticed in other villages on FamilySearch that some archives have whole years missing, which is odd. Up until now I've been waiting to see if there are updates but the process is very opaque and I'm getting impatient
So there it is, does anyone have information or tips on how to proceed given the apparent lack of internet archives? Maybe I am missing a source? Grazie mille in advance to anyone who can lend a hand

