sentences:  On 30 March and continuing to 3 April these air forces attacked Hollandia itself and the airfields on the Sentani plain.Achieving complete surprise they were able to destroy nearly 100 aircraft on the ground, leaving 6 Air Div unable to resist the planned invasion.On 16 to 18 April the amphibious forces sailed from their bases at Finschafen and Goodenough Island, taking evasive routes to confuse their intentions until they arrived off Hollandia during the night of 21/22 April.