The bonuses you earn from a city-state depend on how many Envoys you have sent to the city-state. Envoys are earned over time with influence points (which come from Governments and Policies), or instantly by completing certain Civics. Once earned, you will receive a prompt to choose which city-states to send them to. If you have multiple Envoys, you may divide them between city-states as you desire.
Declaring war directly on a city-state removes all Envoys you had there. Otherwise, Envoys stay on the city-state permanently. Envoys at a city-state are visible to all players, and placing them may have diplomatic consequences. The bonuses earned are based on how many Envoys you have present, regardless of who else has Envoys there. City-states of a type all share the same Type Bonuses. They are cumulative, so that as a player places more and more Envoys on a city-state, they stack with the bonuses from before. Each Envoy placed in a city-state expands its borders by 1 tile.
Successfully completing the espionage mission Fabricate Scandal will remove a rival's Envoys from the targeted city-state.
Envoys
The bonuses you earn from a city-state depend on how many Envoys you have sent to the city-state. Envoys are earned over time with influence points (which come from Governments and Policies), or instantly by completing certain Civics. Once earned, you will receive a prompt to choose which city-states to send them to. If you have multiple Envoys, you may divide them between city-states as you desire.
Declaring war directly on a city-state removes all Envoys you had there. Otherwise, Envoys stay on the city-state permanently. Envoys at a city-state are visible to all players, and placing them may have diplomatic consequences. The bonuses earned are based on how many Envoys you have present, regardless of who else has Envoys there. City-states of a type all share the same Type Bonuses. They are cumulative, so that as a player places more and more Envoys on a city-state, they stack with the bonuses from before. Each Envoy placed in a city-state expands its borders by 1 tile.
Successfully completing the espionage mission Fabricate Scandal will remove a rival's Envoys from the targeted city-state.