No, I just wondered if one division of the 8th Army rotates home while the other division rotates in, or if they just stay there for their whole tour of duty. That seemed like it would explain why it’s an “army” with only something over a division’s worth of personnel on hand.
I know that our Army today uses the brigade style of organization rather than a divisional organization, but I don’t know if that is in play here.
No, the Eighth Army is permanently domiciled there, just like the 3rd MarDiv is permanently domiciled in Oki.