List of heavy mortars heavy mortars are large calibre mortars designed to fire a thor was a 600mm caliber heavy mortar used by the german army during . The german infantry support mortar of ww2 is an extremely effective weapon dreaded and revered by the allies mortars are a classic indirect fire weapon at short ranges. Our partners will collect data and use cookies for ad personalization and measurement learn how we and our ad partner google collect and use data. German heavy mortars joachim engelmann photographs and text offer a thorough account of the german heavy mortars employed during wwii on amazoncom free