 The military leased sections of the north and south sides of the island — 25 @.@ 83 acres ( 10 @.@ 45 ha ) for $ 3 @,@ 000 — from the John Papa ʻĪʻī estate to build 6 @-@ inch ( 15 cm ) gun batteries : Battery Boyd and Battery Henry Adair . In 1917 , the John Papa ʻĪʻī estate agreed to sell part of the Island to the United States for construction of an airfield , despite the Oahu Sugar Company complaining in court that the sale would hurt their business . 
