I believe the reason is that iron weapons are easier to make, hence you can field larger armies.
IIRC, it’s not actually easier to make iron (you need higher temperatures), but the ore is more easy to obtain. Copper and tin ores are rarely found together, so you need long-range trading to make lots of bronze.
That roughly the same as my understanding of the advantage of basic iron vs bronze.
I believe the reason is that iron weapons are easier to make, hence you can field larger armies.
IIRC, it’s not actually easier to make iron (you need higher temperatures), but the ore is more easy to obtain. Copper and tin ores are rarely found together, so you need long-range trading to make lots of bronze.
That roughly the same as my understanding of the advantage of basic iron vs bronze.