Sapient Slavery is forbidden within the state. Any attempt to subvert this concept by importation of slaves or institution of slavery in any way must be prevented and punished by the military.
Unlicensed Environmental Manipulation
Terraforming must be licensed and controlled, with proper safeguards applied.
One State, One People
There is only one state. The existence of any polity considering itself outside the state is strictly forbidden, and any attempt to establish such will be rigorously opposed.
Primitive Worlds Must Be Allowed To Develop
Technologically retarded worlds must not be interfered with if they are to develop properly.
Each Dictum you select defines not only your military, but your society, so you can choose Dicta for your military which reflect your military's culture, or define your culture as you define your military.