Complex sentence: Three Kittyhawk aircraft of No.76 Squadron RAAF landed on the airstrip on 22 July, while others, No.76 and also No.75 Squadron RAAF arrived on 25 July.
Split into simpler sentences: Three Kittyhawk aircraft of No.76 Squadron RAAF landed on the airstrip on 22 July. Kittyhawks from No.76 Squadron and No.75 Squadron RAAF arrived on 25 July.