German Medic killed in action in a trench near Grevillers, captured by the New Zealand Division, 24 August 1918 - National Library of New Zealand image

Note the 'Mimikry' camouflage painted helmet in the foreground.

 

Source: natlib.govt.nz/records/22800092?search[path]=items&search[text]=stick+grenade

 

Trench map: repository.mcmaster.ca/fedora/repository/macrepo:4071

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