Armadillo rolled into a ball for defense.

Armadillo

Armadillo rolled into a ball for defense.

The common chameleon (Chamaeleo chamaeleon) is a lizard that is well known for its camouflage ability.

Common Chameleon

The common chameleon (Chamaeleo chamaeleon) is a lizard that is well known for its camouflage ability.

This fender is made out of metal like fencing used to protect the rail cart from larger road debris.

Pick UP Car Fender

This fender is made out of metal like fencing used to protect the rail cart from larger road debris.

An illustration of the defense at Fort Sumter.

Defense at Fort Sumter

An illustration of the defense at Fort Sumter.

"Section of Fortified Wall. (Interior on the left; exterior on the right.) a, a, is the abatis; b, b, the counterscarp; c, c, the palisade; d, d, the scarp; f, f, the fraise; f, e, g, g, the parapet; h, the banquette; and i, g, the breast-height." -Whitney, 1911

Section of Fortified Wall

"Section of Fortified Wall. (Interior on the left; exterior on the right.) a, a, is the abatis; b, b,…

The Gates Medal shown above the defense of Charleston.

Gates Medal

The Gates Medal shown above the defense of Charleston.

"Gauntlet of mail forming part of the hauberk, 13th century. In medieval armor, a glove of defense." -Whitney, 1911

Gauntlet of Mail

"Gauntlet of mail forming part of the hauberk, 13th century. In medieval armor, a glove of defense."…

"Gauntlet of plate, early 14th century. In medieval armor, a glove of defense." -Whitney, 1911

Gauntlet of Plate

"Gauntlet of plate, early 14th century. In medieval armor, a glove of defense." -Whitney, 1911

"Gauntlet of plate, later 14th century. In medieval armor, a glove of defense." -Whitney, 1911

Gauntlet of Plate

"Gauntlet of plate, later 14th century. In medieval armor, a glove of defense." -Whitney, 1911

A protective coat made of woven chains.

Coat of Mail

A protective coat made of woven chains.

Murex is a genus of predatory gastropod mollusks.

Murex

Murex is a genus of predatory gastropod mollusks.

The long-tailed pangolin (Manis tetradactyla) are known as scaly anteaters because of the large keratin scales used for defense.

Long-Tailed Pangolin

The long-tailed pangolin (Manis tetradactyla) are known as scaly anteaters because of the large keratin…

Plots of land reserved for use as a military defensive position.

Roman Camp

Plots of land reserved for use as a military defensive position.

A Roman scutum shield.

Roman scutum

A Roman scutum shield.