Blamey and Berryman remained close for the rest of the war, and Blamey came to rely heavily on Berryman for advice. It was Berryman who was sent to Wau to investigate the difficulties that Savige was having, and it was Berryman who exonerated Savige. "I reported the situation Blamey and Herring," Berryman record in his diary, "and said Savige had done well and we had misjudged him." Berryman was intimately involved with the planning of the Salamaua–Lae campaign, working closely with Brigadier General Stephen J. Chamberlin at General Douglas MacArthur's General Headquarters (GHQ) in Brisbane. Berryman established good working relations with the Americans, even though their staff practices were quite different from those of the Australian Army.