21st Armored Infantry Battalion
Shield: Per pale argent
and sable, a bridge of three arches, the center one broken, flanked by two
towers, counterchanged. On a canton embattled azure, a cross pattee of the
first (for the 17th Infantry), all within a bordure per pale sable and
Crest: On a wreath of
the colors argent and sable an eagle displayed wings inverted head to
sinister on a thunderbolt or.
Motto: Tonitus Fulmen
Secuti (The Thunderbolt follows the lightning.)
Description: The black and white border denotes the unitís descent from the 55th Armored Infantry Regiment. That which is with in the border is from the coat if arms of the 55th Armored Infantry Regiment which had as its parent unit the 55th Infantry Regiment of World War I. See description of the 55th Armored Infantry Battalion for explanation.