Complex sentence: Macarthur-Onslow was commissioned captain of the Camden Squadron of the New South Wales Mounted Rifles in 1892, later serving with the Imperial Army in India from 1894 to 1895 seeing active service in the Chitral Expedition.
Split into simpler sentences: Macarthur-Onslow was commissioned captain of the Camden Squadron of the New South Wales Mounted Rifles in 1892. He served with the British Indian Army from 1894 to 1895, seeing active service in the Chitral Expedition.