From 1915, soldiers on both sides use entrenching shovels as weapons so they routinely sharpened its edges; like how entrenching shovels were used in the brutal hand-to-hand fighting during the Battle of Stalingrad in WW II.
From 1915, soldiers on both sides routinely sharpened the edges of entrenching shovels for use as weapons. In WW II, entrenching shovels were used in the brutal hand-to-hand fighting during the Battle of Stalingrad. 
