Diplomacy focused effects on your Empire with penalties if you violate (you can usually violate if they specify military)
Peace Treaty - lose influence for dealing damage with target empire (it is symmetrical)
Trade Agreement - target player can see your resources/economy info
No Fly Zone - area you can't enter
Non aggression Zone - You can't shoot into / out of
Arms Control - Limit number of X unit
Public Ally - Target player must not be target of your initiatives
Embargo - Penalties if Target Empire X trades with another empire
Penalties:
Getting shot at by neutral units
Lose influence
Diplomacy focused effects on your Empire with penalties if you violate (you can usually violate if they specify military)
Peace Treaty - lose influence for dealing damage with target empire (it is symmetrical) Trade Agreement - target player can see your resources/economy info No Fly Zone - area you can't enter Non aggression Zone - You can't shoot into / out of Arms Control - Limit number of X unit Public Ally - Target player must not be target of your initiatives Embargo - Penalties if Target Empire X trades with another empire
Penalties: Getting shot at by neutral units Lose influence