SD:Mortier M21

 is a French Artillery unit.

Overview
Combining the M1 81mm and the M3 Half-track, M21 illuminate targets at night or provide indirect fire support to the infantry. M21 replaced the M4 which was similar but based on the smaller M2 Half-track design.

Each Armored Infantry Battalion and Armored Battalion has a Mortar Platoon of three M21 in the Headquarters Company. 57 vehicles were lend leased to the French.