Fake trees were used in WW1 as observation posts.

Image from preview.redd.it and submitted by Friedrich_98
image showing Fake trees were used in WW1 as observation posts.

TravelPhoenix on April 12nd, 2019 at 01:12 UTC »

Looks like a real tree they hollowed out and lined with plate armor.

mattwillis on April 12nd, 2019 at 01:26 UTC »

I'm imagining a soldier waking up one morning and looking across the trench and thinking, "Wait, was there always a tree there?"

Which leads to the bigger question, how would they set this up?

CreamyKnougat on April 12nd, 2019 at 01:47 UTC »

"Hans...do you remember a tree being there?"

<tree giggles>