. . . . "None"@en . . "Bronze Working allows the building of the Phalanx unit, the cheapest unit to have a defensive strength of 2. It also allows the construction of the trade boosting Colossus wonder. It is a prerequisite of iron working and currency."@en . "Bronze Working allows the building of the Phalanx unit, the cheapest unit to have a defensive strength of 2. It also allows the construction of the trade boosting Colossus wonder. It is a prerequisite of iron working and currency."@en . . "Bronze Working (Civ1)"@en . . .