Allegedly.
Haven't seen this before. Apologies if old hat.
Tank F1 crossing a trench at the Tank Driving School during the special training for the Battle of Cambrai at Wailly, 21 October 1917.
"Sometimes things that are not true are included in Wikipedia. While at first glance that may appear like a very great problem for Wikipedia, in reality is it not. In fact, it's a good thing." - Wikipedia.
