Which constraint limited early Mesopotamian bronze metallurgy, making superior weaponry intermittently scarce?

💡 Explanation

Limited tin deposits lead to unreliable transport of cassiterite (tin ore) via trade routes causing intermittent bronze scarcity, a limitation of *supply chain disruption*, because cassiterite sources were geographically disparate; therefore complete armies could not be outfitted with bronze weaponry, rather than consistently suffering inferior alloy ratios.

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