German soldiers with an anti-tank gun in the outskirts of Stalingrad.

Anti-tank crew

Invasion of Poland, Sept 1939: Railroad artillery ready to open fire; 150 mm guns in the foreground coupled by 170 mm in the background. These guns were usually deployed in 3-gun batteries; their primary advantage was their fast movement from point to point, which compensated in part for the restriction of being able to move only along railroad routes. 


Railroad artillery

The 3.7 cm (37 mm) Flak 18/36/37/43 was a series of anti-aircraft cannon produced by Nazi Germany that saw widespread service in the Second World War. The cannon was fully automatic and effective against aircraft flying at altitudes up to 4,200 m. The Germans used their anti-aircraft pieces in ground support roles as well; 37 mm caliber guns were replaced by the Bofors 40 mm gun and later, by 35-mm anti-aircraft pieces. 