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At the end of the 1930s the British Army replaced its 18 pounder gun and 4.5 inch howitzer (which both dated from the 1900s) with the dual purpose 25 pounder gun-howitzers.
However, could a gun-howitzer have been developed for the Royal Field Artillery in the 1900s instead of the 18pdr gun and 4.5" howitzer?. And if it was possible would it have made any difference in World War One?