North - eastern Australia became the operational theatre of the US Fifth Air Force , its headquarters in Brisbane , with the headquarters of its V Bomber Command in Townsville .
The role of the airfield now diversified well beyond the fighter defence of Townsville .
North - eastern Australia became the operational theatre of the US Fifth Air Force , Townsville 's headquarters in Brisbane , with the headquarters of its V Bomber Command Townsville Townsville .
The role of the airfield now diversified well beyond the fighter defence of Townsville .