Industrial

Johannesburg

Suzerain and envoy bonuses summarised in our own words from the game data.

Suzerain bonus

Cities gain +1 Production for each type of resource they have improved, rising to +2 after you research Industrialization.

Game data traceMINOR_CIV_JOHANNESBURG_UNIQUE_INFLUENCE_BONUS, MINOR_CIV_JOHANNESBURG_UNIQUE_INFLUENCE_BONUS_LATE

Strategy guide

Every city gains +1 Production per improved resource type (+2 after Industrialization). A city working five different improved resources gets +10 Production later on — across an empire this is one of the strongest economic suzerain bonuses in the game. Improve everything, even resources you don't strictly need.

Best civs & plans

Universally strong; wide, improvement-dense empires (India, Rome) squeeze out the most. Contest it in almost every game.

Envoy plan

Treat Johannesburg as a three-envoy commitment from the first meeting, and expect to defend it with more. The suzerain bonus is empire-wide production that nothing else in the game replaces, and the industrial envoy tiers stack on top: faster districts and buildings in the capital and Workshop cities at one envoy, Factory and Consulate cities at three. The AI values it correctly, which means a strong industrial or wide neighbor will pass four envoys by the medieval era; hold five and keep one in reserve. Six envoys is entirely justified here since Power Plant cities gain extra production too, making Johannesburg the one city-state where maximum investment rarely feels wasted.

Value by era

Johannesburg matters in every era, but its curve has two distinct steps. In the ancient and classical eras a young city working two or three improved resources gets a modest boost that nonetheless shortens the first Campus or Holy Site by a few turns, and the bonus grows organically as builders improve more resource types. The medieval and renaissance eras add strategic resources like niter and new luxury types, pushing cities toward four or five types. Industrialization doubles the per-type value and marks the true peak, arriving exactly when Factories and wonders demand the most production. It never fades; a late-game suzerainty still adds several production to every city and remains worth chasing until the final turn.

Pitfalls and how to protect it

Counting is where players go wrong: the bonus is per resource type, not per tile, so a city with four improved wheat tiles counts once. Spread different resources across cities when choosing sites, and improve bonus resources like stone and deer that you would normally ignore. Harvesting a resource for a one-time yield permanently removes it from the count, which is a real cost that chop-heavy players overlook. Because every AI wants Johannesburg, losing the lead mid-game is common; check the city-state screen every few turns rather than assuming the margin holds. Levying its units is rarely needed, but declaring a Protectorate War is justified when a neighbor moves on it, and liberating a captured Johannesburg hands you suzerainty at once.

Envoy bonuses

  • 1 envoy+1 Production toward wonders, buildings and districts in your capital and in each city with a Workshop.
  • 3 envoys+2 Production toward wonders, buildings and districts in each city with a Factory or a Consulate (+4 if the city has both).
  • 6 envoys+3 Production toward wonders, buildings and districts in each city with a Power Plant or a Chancery (+6 if the city has both).

Envoy bonuses are shared by every city-state of the same type.

Plan your districts in the adjacency calculator →

Other Industrial city-states

Related guides

Last reviewed: 2026-10-03