https://www.milsurps.com/images/impo...59_large-1.jpg
Army Maneuvers In Louisiana
Date taken:1941
Photographer:Ralph Morse
https://www.milsurps.com/images/impo...43_large-1.jpg
http://www.milsurps.com/images/impor...c8_large-1.jpg
Printable View
https://www.milsurps.com/images/impo...59_large-1.jpg
Army Maneuvers In Louisiana
Date taken:1941
Photographer:Ralph Morse
https://www.milsurps.com/images/impo...43_large-1.jpg
http://www.milsurps.com/images/impor...c8_large-1.jpg
Top pic looks like a gas trap from the side view...
For interesting reading on the subject of the maneuvers I recommend "The U.S. Army GHQ Maneuvers of 1941" by Christopher R. Gabel, 1991, Center of Military History U.S. Army, available from the Government Printing Office. Besides describing the maneuvers the author relates the doctrine and organization that was developed and was used during World War II.
The selected images were all reduced by about half to 1/3 their original scanned size and lost resolution. If you care to review the original scan of any of these PM me. The image of cavalry passing a BAR position at a road junction in Georgia is interesting because of the cartridge bandoleers around the horses necks.
The soldiers in the pontoons appear to be manning tillers.
Here's a detail of the first three pontoons, and the engineers are just standing, apparently at rest as the middle soldier appears to have his hands in his pockets. But no tillers. I mistook the anchor to be be something else.