Casualty figures in wartime are frequently disputed and difficult to verify. After years of debate over Gaza’s official counts since fighting escalated in October 2023, the Israel Defence Forces have reportedly accepted an estimate that some 71,000 Palestinians have been killed.
That apparent acceptance matters because Gaza’s health ministry tallies have generally been treated as broadly credible by many outside observers. Therese Pettersson of the Uppsala Conflict Data Program (UCDP) at Uppsala University told DW that UCDP’s long-running compilation of public casualty data strengthens the record and makes outright denial of such losses harder.
It is uncommon for belligerents to concur on fatality totals. In many conflicts, each side understates its own losses and overstates the opponent’s to maintain morale or claim success, UCDP analyst Shawn Davies noted. For comparison, neither Moscow nor Kyiv publishes reliable, regular counts of their forces’ deaths in the Russia-Ukraine war; Russia has not updated its official losses in over three years.
Casualty monitoring draws on a wide range of sources — official notifications, hospital and morgue lists, eyewitness accounts, media reporting and social media — and investigators cross-check and validate those reports, often using local networks. Different monitoring groups apply different filters to exclude unreliable claims. UCDP tends to accept admitted losses by a party while treating claims about an adversary with greater caution. Its methodology is conservative: it counts confirmed deaths only, not injuries or missing people, to provide a baseline for tracking trends.
Other research teams use broader methods and different inclusion rules. A recent CSIS report combined sources such as the UK Ministry of Defence, Mediazona, BBC Russian and interviews with officials to produce much larger estimates for the Russia-Ukraine conflict — roughly 1.2 million Russian battlefield casualties overall and 275,000–325,000 Russian deaths by December 2025, alongside large Ukrainian casualty estimates. Davies said UCDP’s best estimate for Russian fatalities is nearer 350,000, illustrating how methods and definitions shape results.
For casualty researchers, each recorded death contributes to an accurate historical record. Lily Hamourtziadou, who has worked with Iraq Body Count and other monitors, described the IDF’s reported alignment with Gaza figures as surprising but welcome, while warning that parties can accept reduced numbers for political reasons. She argued that states using force bear a responsibility to document whom they have killed — preferably including names and ages — both to acknowledge the human cost and to preserve dignity for the victims.
Edited by: A. Thomas