Complex sentence: Cros transferred to the 39th Infantry Regiment on 5 April 1898 and served with them in Algeria from 11 November 1899 to 1 June 1900.
Split into simpler sentences: Cros transferred to the 39th Infantry Regiment on 5 April 1898. He was on active service in Algeria from 11 November 1899 to 1 June 1900.