A Mortar in Nottingham, England
A Chimeran Mortar is a weapon seen exclusively in Resistance: Fall of Man. It has the ability to bombard battlefields at an alarming rate. During Operation Shear just two Chimeran Mortars were enough to wipe out a whole task force leaving only Nathan Hale the sole survivor. They also appear to have the ability to take down a VTOL in mid-air.
The mortars are destructible from gunfire. If you melee a mortar, there is a good chance that it will explode and significantly injure you at close range.