David Pearson, FSA, is an archaeologist and information technology specialist at the Department of Parliamentary Services, Canberra. He has published extensively on archaeological, digital preservation and military historical issues and his main research interests concern the technological and social contexts of conflict archaeology. Catastrophe is his fourth book. Paul Thost, AFAIM, was born in Germany in 1929 and came to Australia in 1953 where he built a career in the automotive industry. Paul has written numerous articles for aviation magazines and translated many German technical documents for the Australian War Memorial over a period of 15 years. He is currently a volunteer at the Army Museum of Tasmania. Tony Cowan is a retired British diplomat currently writing a book based on his PhD thesis on German operational command in the First World War. He has lectured widely and contributed book chapters on the regional identities, defensive tactics, command and battleworthiness of the German army during the war.