What's with those logs on tanks?

Gas Powered Fahrschulwanne Tanks - Tank Encyclopedia

logging+Truck+Data, The Loader Is Used To Lift The Log Truck Trailer From The Truck. Stock

Explained: Meet the mighty Challenger 2 tank, by Ministry of Defence, Voices Of The Armed Forces

What's with those logs on tanks?

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What's With the Logs on Soviet Tanks? Koala Explains: Tanks - Tracks and Traction

LOGGING ON, Soldiers from number 3 Company The Coldstream G…

Why do tanks have wood on the side? - Quora

Water Tower - Crosslake Log Village

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Desperate Russian army is attaching wooden logs as armor with trucks and tanks – Global Defense Corp

Mark IV tank - Wikipedia