Complex sentence: This led Walker to use his historian's skills to investigate Laurie's life and the discovery that his uncle had volunteered for service with the 13th squadron of the RAAF and had been posted to Ambon.
Split into simpler sentences: This led Walker to use his historian's skills to investigate Laurie's life. He discovered that his uncle had volunteered for service with the 13th squadron of the RAAF and had been posted to Ambon.