With regard to notability, all war monuments are landmarks potentially
worthy of a Wikipedia article. Due to how difficult it is to source
the material, I would encourage any group or individual to consider
extending (or more likely creating) the article for the local town or
village that created the monument, though some monuments are found at
cross-roads or at scenic positions (I'm thinking of the large memorial
I stopped to photograph in North Uist which only has sheep as
neighbours but is still the location for a well attended annual
memorial ceremony and is the opportunity to remember those more
recently killed in war action).
The cross-links to information about regiments, battles and individual
acts of bravery that were recognized with notable medals all add value
to Wikipedia and though the information may start with a photo on
Wikimedia Commons or a single document on Wikisource, I would strongly
encourage volunteers to help expand the quality of Wikipedia's
coverage of these areas of local interest. It strikes me as the sort
of improvement that local schools might be excellent at helping with.
Cheers,
Fae