"Another notable document is a letter from Hittite generals in western Anatolia appealing to the king for reinforcements in men, horses and chariots to fend off enemy forces. "

I had assumed they had to wait for clay to dry before it could be carried anywhere, which seems incompatible with using them for urgent military messages. I wonder if there was a way to transport them while soft, or if this was just the archival copy of a message sent by other means.