Since posting about the game "Battle" last week, I have tried without success to see if I could date the patent number it cites. However, I did obtain from Abebooks a copy of Yesterday's Shopping, a facsimile version of Gamages General Catalogue of 1914 (Gamages were listed on the game leaflet as its retailer). Sure enough, on page 191, the last page of the catalogues, there is an entry for this "exciting war game". As this is in a section called the Latest Table games, it seems reasonable to expect the game to be dated to around 1912 or 1913.
Well I never!