The first fighter aircraft , Kittyhawks of No. 75 Squadron RAAF under the command of Squadron Leader John Francis Jackson , reached Port Moresby on 21 March , flying by way of Horn Island .
They lacked the range to fly directly from Townsville .
The first fighter aircraft , Kittyhawks of No. 75 Squadron RAAF under the command of Squadron Leader John Francis Jackson , reached Port Moresby on 21 March , flying by way of Horn Island because they lacked the range to fly directly from Townsville .