The Settlers III / Romans / Practical economy notes / 15 September 2026

Build in working chains,
not isolated buildings.

A flexible Roman opening, followed by repeatable expansion targets. The important distinction: a mill's processing capacity is not the same as the grain supply needed to keep it busy.

Classic Settlers III rules. These are community rules of thumb and my suggested sequencing, not a measured optimal build or a guide to balance mods. Starting tools, fish, field placement, mine yield and enemy pressure change the order.

1. A balanced Roman opening

StageBuild towardMove on when…
Construction seed2 woodcutters, 1 sawmill, 1 stonecutter; a medium residence; a forester before nearby trees run out. Send geologists and claim necessary land.Boards, stone and free settlers are available.
Economic expansionIf safe, grow toward 4–6 woodcutters, 2–3 sawmills, 2–3 foresters and 2–3 stonecutters. Start a grain farm early; add vineyards early if pursuing promotions.You can fund complete production chains without exhausting construction supplies.
First tools / weaponsFishing where available; coal and iron mines; iron smelter. Add a toolsmith before starting tools run out, then weaponsmith and barracks. Add the second coal mine as forging demand grows.A small weapons line runs continuously, not just from starting stocks.
Replace temporary foodWaterworks, mill and first bakery as grain arrives. Add another farm/bakery, then expand grain supply for a pig farm and butcher.Coal gets bread and iron gets meat; fish covers shortages.
Repeat the expansionPrepare more food, then add mines → smelters → weaponsmiths. Keep adding residences and enough construction capacity. Gold and toolmaking need resources beyond the weapons-only ratios.Weapons, food and free settlers remain in balance.

Suggested sequence synthesized from general Roman opening advice and the Roman random-map build; counts are targets, not simultaneous construction queues.

2. Ratios worth remembering

ChainPlanning ratioMeaning
Timber1 forester : 2 woodcutters : 1 sawmillStart here; poor worker paths can require extra capacity.
Bread-only group3 grain farms : 1 mill : 3 bakeries + 1 well-placed waterworksGrain dedicated to bread, not shared with pigs. A useful target for approximately 6 coal mines.
Bread consumers1 bakery → about 2 coal minesAssumes reliable grain, flour, water and deliveries.
Grain for pigsAbout 1 well-placed grain farm : 1 pig farmDedicated grain supply, not simultaneously counted toward bread. Add farms if the pig farm waits for grain; water is also required.
Pig processing2–3 pig farms → 1 butcherThe butcher has spare capacity with only one pig farm; do not duplicate it automatically.
Meat consumers1 supplied pig farm, through a butcher → about 2 iron minesAdd enough grain and water first; this is not a standalone one-building chain.
Weapons1 productive iron mine + 2 productive coal mines → 2 iron smelters → about 2 weaponsmithsA conservative starting group. Add smith capacity when iron accumulates; weak deposits support less industry.
Roman promotionsRoughly 2 vineyards : 1 small temple for sustained throughputRefines the earlier 1:1 suggestion. Extra temples help process a wine stockpile, but empty temples do not speed upgrades.

Sources: rounded production cycles, food-to-mine planning, and experienced players comparing ratios. Farm and livestock estimates differ between guides; use these as starting targets and inspect stocks.

Why one mill is enough: the cycle table lists roughly 4 flour/minute for a mill versus 1⅓ bread/minute for a bakery. That gives capacity for three bakeries, but only if farms actually supply the grain. An early mill being partly idle is normal.

The dedicated food-chain guide recommends one grain farm per pig farm. Its livestock recipe differs from the separate cycle table, so treat this as a practical starting ratio, not a verified exact engine constant. The mana guide explicitly recommends two vineyards per small temple.

3. A repeatable midgame target

Industry: 2 productive iron mines + 4 productive coal mines + 4 iron smelters + 4 weaponsmiths. Add a fifth weaponsmith only when inputs permit.

Food: start around 3 grain farms + 1 mill + 2 bakeries + 1 pig farm + 1 butcher + 2 waterworks, with fishing support. Add a fourth farm if grain runs short; add a third bakery if flour accumulates and coal miners need bread.

This is a monitored expansion target, not a guarantee that every building runs at 100%. A second similar group can share the first butcher if transport remains practical.

Adapted from the low-goods production groups and community ratios. The low-goods author's version explicitly includes 3–5 fishermen. My suggested fourth farm is a buffer, not an independently tested optimum.

4. Change the order to suit the game

Only future recruits receive a newly unlocked rank; existing troops do not upgrade. Delay mass recruitment only when safe. Original manual: promotions.

5. Scale by the shortage you can see

Grain missing → farms / fields · Flour accumulating → bakeries · Bread piling up → demand / delivery · Iron bars accumulating → smiths / coal

Build farms before you need the food: the first crop takes roughly ten game minutes. Reserve clear growing space near the entrance. Keep food processing and industry close enough for dependable deliveries, and do not recruit away all your carriers. Farm startup and placement · Manual: carriers and transport.

6. Why the enemy reaches higher ranks first

Vineyard → wine → small temple → promotion progress → choose a troop type → recruit. At 100% divine-promotion progress, use the troop-type button in the Military menu. Promotions apply only to soldiers recruited afterwards, not troops already on the map. Continuous early recruitment can therefore leave most of your army at level 1 even after unlocking higher ranks. Original manual: recruitment and promotions.

Food is not troop training. Bread, fish and meat feed miners, indirectly supporting weapon production; they do not raise soldier rank. Gold affects combat strength, a separate measure from level 1/2/3. Food consumers · Rank versus combat strength.