A field gun is a field artillery piece. Originally the term referred to smaller guns that could accompany a field army on the march, that when in combat could be moved about the battlefield in respons
A post-WWI French 105 mm field gun
German field guns captured by the NZEF displayed in London, 1918
A mortar today is usually a simple, lightweight, man-portable, muzzle-loaded cannon consisting of a smooth-bore metal tube fixed to a base plate with a lightweight bipod mount and a sight. Mortars are
Field gun
…to changing circumstances (field artillery), as opposed to guns installed in a fort (garrison artillery or coastal artillery), or to siege cannons and mortars which are too large to be moved quickly, and would be used only in a prolonged siege. Perhaps the most famous use of the field gun in advanced tactics…
United States Army soldiers firing an M120 mortar (round visible in smoke) during the war in Afghanistan
Engraving depicting the Venetian siege of the Acropolis of Athens, September 1687. The trajectory of the shell that hit the Parthenon, causing its explosion, is marked.
German 7.5 cm Minenwerfer
Wilfred Stokes with example of his WWI mortar and bombs