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"Abatis consisting of trees lying parallel to each other with the branches pointing in the general direction of approach and interlaced. All leaves and small twigs should be removed and the stiff ends of branches pointed." — Moss, 1914

Abatis

"Abatis consisting of trees lying parallel to each other with the branches pointing in the general direction…

"They are usually made in sections of manageable length chained together at the ends." — Moss, 1914

Cheveaux de frise

"They are usually made in sections of manageable length chained together at the ends." — Moss,…

Evacuation of Corinth, Mississippi- Confederate fortifications, from the northern angle, looking south- pursuit of the retreating Confederates by the Federal Cavalry under General Smith. The details of the evacuation of Corinth, by Beauregard, beyond those contained in the official reports of General Halleck, were that Beauregard's force did not exceed 60,000 men. Nobody was left in town except women and children and old men; everything was taken away except a few provisions, which were burned. They did not leave a single gun, and had been moving their stores for two weeks, and their troops for six days. Their fortifications were five miles long, extending from the Memphis and Charleston to the Mobile and Ohio Roads. But they were much weaker than supposed. They could have been carried by storm at any time.

Evacuation of Corinth

Evacuation of Corinth, Mississippi- Confederate fortifications, from the northern angle, looking south-…

"A fraise is a palisade horizontal, or nearly so, projecting from the scarp or counterscarp. A modern and better form consists of supports at 3 or 4 feet interval, connected by barbed wire, forming a horizontal wire fence." — Moss, 1914

Fraise

"A fraise is a palisade horizontal, or nearly so, projecting from the scarp or counterscarp. A modern…

Hadrian's Wall is a stone and turf fortification built by the Roman Empire across the width of what is now northern England. Construction began in 122 AD.

Hadrian's Wall

Hadrian's Wall is a stone and turf fortification built by the Roman Empire across the width of what…

"Palisades should be planted to incline slightly to the front. As little earth should be disturbed in digging as possible, and one side of the trench should be kept in the desired plane fo the palisade." — Moss, 1914

Palisade

"Palisades should be planted to incline slightly to the front. As little earth should be disturbed in…

A pile of sandbags.

Sandbags

A pile of sandbags.

"An abatis formed by felling trees toward the enemy, leaving the butt hanging to the stump, the branches sharpened, is called a slashing." — Moss, 1914

Slashing

"An abatis formed by felling trees toward the enemy, leaving the butt hanging to the stump, the branches…

"In the high entanglement the stakes average 4 feet from the ground, and the wiring is horizontal and diagonal." — Moss, 1914

High wire entaglement

"In the high entanglement the stakes average 4 feet from the ground, and the wiring is horizontal and…

"An ordinary barbed-wire fence is a considerable obstacle if well swept by fire. It becomes more formidable if a ditch is dug on one or both sides to obstruct the passage of wheels after the fence has been cut." — Moss, 1914

Wire fence

"An ordinary barbed-wire fence is a considerable obstacle if well swept by fire. It becomes more formidable…