Forum:KB:How soon did Thrawn return to the Unknown Regions?

Apparently Thrawn established the capital for his new empire in 10 BBY. Not for want of looking, but is there anything revealing a more precise timeframe in which he returned to the Unknown Regions to begin the process of amassing The Empire of the Hand? I have not read any of the trilogy books, though it seems they don't touch on the early Imperial era very much.Ghostly Menace (talk) 01:35, December 31, 2013 (UTC)