21ST REPLACEMENT BATTALION
Distinctive Unit Insignia
A gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of two crossed unlit gold torches surmounted in center by a gold torch with red flames. In base a blue scroll bearing the inscription in gold letters "STRENGTH AND SERVICE."
The central flaming torch symbolizes the organization's active capabilities in its mission to supervise and control processing, orientation, limited equipping, messing and billeting of replacement. The two flameless torches symbolize available replacements for continuity of mission in the same manner as the relay marathon runner in Greek antiquity handed the flaming torch from runner to runner.
The distinctive unit insignia was approved on 19 January 1967.
NOTE: This battalion was never authorized a coat of arms.