A Sap Roller.

[Robert Gray]

Federal troops extend their trenches on Morris Island during the siege of Fort Wagner. A movable sap roller is used to protect the men of the 1st New York Engineers as they work. Haas & Peale photograph from the Library of Congress collection.

 

[mofederal]

Those are a real pain to make. They knew their stuff in those days. A really great image @Robert Gray.

 

[gary]

Taken after the fighting was over, otherwise some of those fellows would not be so carelessly exposing themselves. Note the soldier on the right peering through the loophole. He may be one of Capt. Richard Ela's sharpshooters which was raised from among the various regiments to counter the Confederate Whitworth sharpshooters.

 

[Larryh86GT]

An impressive photo. These men all have the thousand yard stare. It's hard to really put to words.

 

[Seduzal]

Looks like a dot job, Two men working, (shoveling dirt), rest of the men sitting .

 

[bdtex]

Timely photo post. Just finished a book on the Vicksburg Campaign. Lotta material on the sieges at Vicksburg and Port Hudson and saps and such.

 

[Irishtom29]

This is a pretty good book on the siege techniques used at Vicksburg.

https://www.amazon.com/dp/B00V7ZHG0Y/?tag=civilwartalkc-20