From the Maitland Mercury report:
George Eccleston went from Adaminaby in the Snowy Mountains of NSW to fight at the Battle of Messines in 1917, part of the forces that detonated 19 mines under the German front lines.
It was, to that time, the biggest man-made explosion in the world.
The Battle of Messines was the first time the 3rd Australian Division saw service on the Western Front.
Full article available at Maitland Mercury, April 24, 2015.