Complex sentence: In 1889, he raised a squadron of mounted infantry in Picton the squadron later became part of the New South Wales Mounted Rifles in which Antill was commissioned as a captain on 19 January 1889.
Split into simpler sentences: In 1889, he raised a squadron of mounted infantry in Picton. The squadron later became part of the New South Wales Mounted Rifles, the unit into which Antill was commissioned as a captain on 19 January 1889.