ShieldGules, a winged shell between four electric flashes above a grid issuant from base Or.
CrestThat for the regiments and separate battalions of the Indiana Army National Guard: On a wreath of the colors Or and Gules, a demi-lion rampant Argent, holding in dexter paw a laurel branch Vert.
MottoDEO FAVENTE (With God’s Favor).
ShieldRed and yellow are used for Artillery. Antiaircraft fire power is represented by the winged shell. The grid and electric flashes are symbolic of radar control for automatic weapons.
CrestThe crest is that of the Indiana Army National Guard.
The coat of arms was originally approved for the 138th Antiaircraft Artillery Automatic Weapons Battalion on 1 April 1952. It was rescinded on 11 May 1960. The insignia was reinstated and redesignated for the 238th Cavalry Regiment on 5 August 1963.