French troops walk across muddy battlefield.
Muddy waterlogged battlefield.
French troops walking single file across battlefield - a huge mess of mud and shell holes which rain has made giant puddles.
They are far from camera but I am sure they are walking on boards laid down over the muddy ground so that they can walk without getting hopelessly stuck. A few are pushing bicycles.
Cataloguer's note: duplicate of item 'Battlefield' in ON 446 N on *PM2472*.