- For the Steel Division II unit see SD2:Mortar 107mm
Mortar 107mm is a United States Artillery unit.
M2 4.2 inch Mortar was developed from the Stokes mortar similar to British Counterpart 4.2-in Mortar. M2 4.2 inch Mortar were ostensibly fires smoke shells but chemical, Gas and HE shells were created. Chemical and Gas weapons were on stand by to be used in retaliation should the enemy employ chemical weapons. But US forces found the HE and white phosphorus rounds to be useful. These Mortar were used in Chemical Mortar Battalions that were attached to infantry divisions.