The M1 mortar is an American 81 millimeter caliber mortar. It was based on the French Brandt mortar. The M1 mortar was used from before World War II until the 1950s when it was replaced by the lighter and longer ranged M29 mortar.
G.I.'s of the 92nd Infantry Division fire an M1 mortar at Massa in Italy during World War II.
The Brandt mle 27/31 mortar was a regulation weapon of the French army during the Second World War. Designed by Edgar Brandt, it was a refinement of the Stokes mortar. The Brandt mortar was highly influential, being licensed built or copied by numerous countries.
Brandt Mle 27/31 on display at the Romanian Navy Museum
Mk. II vaned HE bomb of Brandt's type for 3-inch Stokes mortar
A Senegalese Tirailleurs crew with a Brandt Mle 1927/31 mortar, December 1939.