I want to add a bonus to research for artillery but does some one knows the category?

For artillery, the category is: artillery

Rocket artillery uses: rocketry

AA can use artillery or: cat_anti_air

Anti-tank can use artillery or: cat_anti_tank

For artillery, the category is: artillery

Rocket artillery uses: rocketry

AA can use artillery or: cat_anti_air

Anti-tank can use artillery or: cat_anti_tank

-jordsta95

 Thank you very much. 😁