List of anti-tank guns

Columns: Caliber ( mm ) | Weapon name | Country of origin | Period
57 | ZiS-30 | Soviet Union | World War II | 75 | Jagdpanzer 38 ( t ) / Hetzer | Nazi Germany | World War II | 75 | Jagdpanzer IV Sd.Kfz . 162 | Nazi Germany | World War II | 75 | Marder I | Nazi Germany | World War II | 75 | Marder II | Nazi Germany | World War II | 75 | Marder III Sd.Kfz . 138 | Nazi Germany | World War II | 75 | Type 1 Ho-Ni I | Japan | World War II

Example questions:
How many different zones of climate were in the nation which first manufactured the Self-propelled anti-tank gun ZiS-30 ? | What form of government was the nation which first manufactured the Self-propelled anti-tank gun Panzerjäger I ? | How many countries make up the nation which first manufactured the Self-propelled anti-tank weapon AEC Mk I Gun Carrier ? | Which people resided in the middle of the nation which first manufactured the Self-propelled anti-tank gun Semovente 47/32 ? | Which country borders the nation across from Mexico which first manufactured the Self-propelled anti-tank weapon M6 Gun Motor Carriage ?

Answers:
five | totalitarian | four | Etruscans | Canada