 When Lieutenant General Krueger 's Sixth United States Army headquarters arrived in Australia in February 1943 , the administrative functions were taken from USASOS and given to a new headquarters , United States Army Forces in the Far East ( USAFFE ) , under MacArthur 's command . This had the same name as MacArthur 's old headquarters in the Philippines , but its function was different . This left USASOS with logistical responsibilities only . The new arrangement was awkward , and required considerable adjustment before it functioned properly . In September 1943 , Marshall was replaced by Brigadier General James L. Frink . 
