sentences:  The area ultimately proved less suitable for the development of airbases than the Allies had assessed, and as a result Allied attention shifted further west towards the Geelvink Bay area, focusing on Wakde and Biak, which were secured in May.Following the securing of the perimeter around Aitape and Tadji Airfields, American troops of the 32d Infantry Division started probing Japanese forces east of Tadji Airfield, in case of a possible counter attack by the 18th Army, now cut off from western New Guinea, by setting up new outposts along the rivers leading to Wewak.Elements of the Japanese 20th Division started digging in between Babiang and the Danmap River around Suain during early May in order to slow down or stop a potential American push eastward.