The intention was to have sites, such as airfields or naval bases that were used in the First World War but, for whatever reason, were not used for military purposes at any time during thee 1939-45 war.
So your hypothetical site would gain that bonus.
We are amending the wording tin a vain attempt to make the intention clearer:
4. A Military site of either World War - wiki or website proof to be posted with your image
- Used in First World War but at no point used for military purposes in the Second
- Aviation use in either war
- Run as a tourist attraction (website or wiki entry to prove)
- Gate guardian (an aircraft or vehicle “standing guard” at the entrance}
- Drone Scene entry