70 cm, 80 cm, 85 cm, and 1 m. Nothing further happened until March 1936 when, during a visit to Essen, Adolf Hitler inquired as to the giant guns' feasibility
The 7.62 cm FK 36(r) and Pak 36(r) (7.62 cm Feldkanone (Field gun)/36 (russisch) and Panzerabwehrkanone (Anti-tank gun) 36(russisch)) were German anti-tank
The 3-inch/50-caliber gun (spoken "three-inch fifty-caliber") in United States naval gun terminology indicates the gun fired a projectile 3 inches (76 mm)
The 90 mm gun M1/M2/M3 was an American heavy anti-aircraft and anti-tank gun, playing a role similar to the German 8.8cm Flak 18. It had a 3.5 in (90 mm)
155mm GPF (coastal defense) 20.3cm K (E) (railroad gun) 21 cm K 12 (E) (railroad gun) 21 cm Mörser 16 21 cm Mörser 18 21 cm Kanone 38 – 1 cannon sent to