My great uncle was a Vickers gunner from 1919 to 1938 - he served with the British Army in India, Afghanistan, China, Mesopotamia, and Palestine. Everything from mule trains in the Khyber Pass to a gun boat on the Yangtze River. He was recalled from retirement in late 1938, cut off at Dunkirk, narrowly avoided being executed in a French Barn and spent WW2 in a progression of bad to worse POW camps (due to insubordination with German guards, attempted escape and at least one case of sabotage that resulted in torture). They simply do not make people (or guns) that tough any more.