Complex sentence: Between 1965 and 1969 they toured extensively in Australia, New Zealand, South East Asia and the Pacific Islands, including a 6 month tour of military bases in Vietnam during 1967-8.
Split into simpler sentences: Between 1965 and 1969 they toured extensively in Australia, New Zealand, South East Asia and the Pacific Islands. This included a 6 month tour of bases in Vietnam during 1967-8.