31ST ENGINEER BATTALION
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Distinctive Unit Insignia


Description/Blazon
A silver metal color insignia 1 1/8 inches (2.86 cm) in width consisting of a black spade bearing a silver edelweiss with yellow center, the spade between two silver stars, the device mounted on a red scroll inscribed "DEMONSTRAMUS" in silver letters.

Symbolism
The two stars allude to the arms of the town of Bischwiller in France (Alsace Ardennes). Considered a "hot spot," the unit suffered its first casualties there. The edelweiss refers to the Rhineland. The spade with edelweiss together with the two stars represent three battle honors awarded the unit for services in the European Theater, World War II. The motto translates to "We Demonstrate."

Background
The distinctive unit insignia was approved on 3 June 1965. It was amended to update the description and add a symbolism on 25 June 2013.




Coat of Arms


Description/Blazon

Shield

Per chevron wavy Gules and Argent, in chief two mullets of the last, in base on a spade Sable an edelweiss Proper.

Crest

From a wreath Argent and Gules, a torteau edged of the first, superimposed with four helicopter blades in saltire Or, surmounted at center by a diminished torteau charged with a mullet of the third and entoured with a wreath of rice stalks Proper.

Motto

DEMONSTRAMUS (We Demonstrate).

Symbolism

Shield

The two stars allude to the arms of the town of Bischwiller in France (Alsace Ardennes). Considered a "hot spot," the unit suffered its first casualties there. The wavy chevron represents Central Europe, the area in which the unit constructed bridges. The edelweiss refers to Rhineland. The spade with edelweiss together with the two stars represent three battle honors awarded the unit for services in the European Theater, World War II.

Crest

The ring and helicopter blades suggest a helipad, highlighting the unit's airmobile equipment support mission, while symbolizing accuracy and precision. The arms of the helicopter blades symbolize the four decorations awarded to the unit for service in Southwest Asia. The torteau, rice stalks and star, adapted from the Vietnam coat of arms represents combat service in that theater of operations.

Background
The coat of arms was approved on 3 June 1965. It was amended to add a crest on 25 June 2013.





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