Lock minister from garrison control
That just controls garrisons.
Can I stop all automatic fabrication of military units?
Theres a couple/three auto build/continuous build features in the game you have to turn off and clean out. In your defense tab under fabrications, turn off the auto-build feature for all four fabrications. Just below that box is a continuous build button, make sure it is off.
Now go to your fabrcation types (land,air,naval,missile). Pick a type. Click all on all production. Empty your build Que. Manually click on the top unit in Production. On the right side of the box you will see a box for continiuous-build and auto-deploy. Make sure continous build is off. Do this for each unit in production by going down the list (once you hit the box, it goes to the next unit) Repeat for each Fabrication type. This will clear out all your continuious build orders the AI has stored and stop further auto building.