List of infantry support guns

Columns: Caliber ( mm ) | Weapon name | Country of origin | Period
76 | 76 mm Canon de 76 Fonderie Royale des Canons | Belgium | Interwar/World War II | 76.2 | 7.62 cm Infanteriegeschütz L/16.5 | German Empire | World War I | 77 | 7.7 cm Infanteriegeschütz L/20 | German Empire | World War I | 77 | 7.7 cm Infanteriegeschütz L/27 | German Empire | World War I | 150 | 15 cm sIG 33 | Nazi Germany | World War II | 152 | 152 mm mortar M1931 ( NM ) | Soviet Union | World War II

Example questions:
The 37-mm trench gun M1915 infantry support gun comes from a country ruled by what house from 1721-1762 ? | The 37 mm Infantry support Gun Model 1917 comes from a country with what capital ? | They Type 11 infantry support gun comes from a country bordered by what sea to the west ? | The Canon d'infanterie de 37 modele 1916 TRP infantry support gun comes from a country with what capital ? | The 1.59 inch Breech-Loading Vickers Q.F . Gun , Mk II infantry support gun comes from a country with what form of government ?

Answers:
House of Romanov | Washington | Sea of Japan | Paris | constitutional monarchy