Background: Despite the large mortality burden of First World War (WW1) on New Zealand (NZ) military forces, no analysis using modern epidemiological methods has ever been conducted. We therefore aimed to study injury-related mortality amongst NZ military forces in WW1.
Methods: An electronic version of the Roll-of-Honour for NZ Expeditionary Force (NZEF) personnel was supplemented with further coding and analysed statistically. We also performed literature searches to provide context.
Results: Out of a total of 16,703 deaths occurring during the war (28 July 1914 to 11 November 1918), injury deaths predominated: 65.1% were "killed in action" (KIA), 23.4% "died of wounds" (DOW), 1.0% were other injuries (e.g. "accidents", drownings, suicides and executions), and 10.5% were other causes (mainly disease). During the course of the war, the annual mortality rate from injury (for KIA + DOW) per 10,000 NZEF personnel in the North Hemisphere peaked at 1335 in 1915 (Gallipoli campaign) and then peaked again in 1917 at 937 (largely the Battle of Passchendaele). Some of the offensive campaigns involved very high mortality peaks (e.g. 2 days with over 450 deaths per day in October 1917).
Conclusions: Participation in First World War was by far the worst fatal injury event in New Zealand's history. Many of these injury deaths could be considered to have been preventable through: better diplomacy (to prevent the war), improved military planning to reduce failed campaigns (e.g. Gallipoli, Passchendaele), earlier use of protective equipment such as helmets, and improved healthcare services.