I would like to add a category for Avenues of Honor in Australia

Question

I would like to know if it is OK to add a category for the Ballarat Avenue of Honour (it has over 3000 trees/names) or for all Australian Avenues with Ballarat as a sub-category and whether this should be a sub category of the Military Category or a sub category of Cemeteries/Memorials or where else it may fit??