Complex sentence: The 2nd Battalion, which was re-formed on 18 September 1857, began to arrive in New Zealand from 4 July 1863 and served in the Waikato and Taranaki campaigns of the New Zealand Wars.
Split into simpler sentences: The 2nd Battalion, which was re-formed on 18 September 1857, began to arrive in New Zealand from 4 July 1863. The battalion served in the Waikato and Taranaki campaigns of the New Zealand Wars.