Mark IV tank demonstration in Duluth, Minnesota, 1917.
https://diqn32j8nouaz.cloudfront.net...onstration.jpg
Previously:
https://www.homemadetools.net/forum/...676#post155751
https://www.homemadetools.net/forum/...2519#post96514
https://www.homemadetools.net/forum/...853#post156342
https://www.homemadetools.net/forum/...664#post147710
https://www.homemadetools.net/forum/...598#post143269
