Aaron O'Neill
Research expert covering historical data
Detailed statistics
Number of casualties and fatalities from the Battle of the Somme in 1916
Detailed statistics
Casualties from the first day of the Battle of the Somme 1916
Detailed statistics
British deaths per day in the Somme department during the First World War 1915-1918
Number of casualties at the Battle of Gettysburg 1863
Number of casualties at the Battle of Gettysburg in the American Civil War in 1863
Number of casualties at the Battle of Shiloh 1862
Number of casualties at the Battle of Shiloh in the American Civil War in 1862
Number of casualties at the Battle of Chancellorsville 1863
Number of casualties at the Battle of Chancellorsville in the American Civil War in 1863
Number of casualties at the Battle of Chickamauga 1863
Number of casualties at the Battle of Chickamauga in the American Civil War in 1863
Number of Palestinian & Israeli casualties caused by the Hamas-Israel war 2023
Number of Palestinian¹ and Israeli² fatalities and injuries caused by the war between Hamas and Israel since October 7, 2023
Number of casualties at the Battle of Antietam 1862
Number of casualties at the Battle of Antietam in the American Civil War in 1862
Number of alive and dead families divided by the Korean War 2023, by age
Number of alive and dead family members divided by the Korean War in South Korea as of October 2023, by age group
Number of casualties in major battles in the American Civil War 1861-1865
Number of casualties in major battles in the American Civil War from 1861 to 1865
Number of reunited family members divided by the Korean War 2000-2023
Number of reunited South and North Korean family members divided by the Korean War from 2000 to 2023
GHG emissions from warfare during the Russia-Ukraine war 2022-2024, by source
Total greenhouse gas (GHG) emissions caused by warfare during the Russia-Ukraine war from 2022 to 2024, by source (in million metric tons of carbon dioxide equivalent)
American Civil War: population of the Union states 1860-1870
Population of the Union States before and after the American Civil War in 1860 and 1870 (in 1,000s)
Population of the Confederate States in the American Civil War 1860-1870
Population of the Confederate States before and after the American Civil War in 1860 and 1870 (in 1,000s)
Number of casualties at the Siege of Vicksburg 1863
Number of casualties at the Siege of Vicksburg in the American Civil War in 1863
Number of visitors to the World War II Memorial in the U.S. 2008-2023
Number of recreational visitors to the World War II Memorial in the United States from 2008 to 2023 (in millions)
Share of Gen Z children worried about what the world will be like U.S. 2024
Share of Generation Z children and adolescents who worry about what the world will be like when they are adults in the United States in 2024, by demographic
Number of civilian casualties during the war in Ukraine 2022-2024
Number of civilian casualties in Ukraine during Russia's invasion verified by OHCHR from February 24, 2022 to July 31, 2024
Number of aircraft involved in attacks on Dresden during WWII 1944-1945
Total number of aircraft used in aerial attacks on Dresden during the Second World War in 1944 and 1945
Impact of data privacy laws on digital advertising in the U.S. 2024
Impact of data privacy laws on digital advertising in the United States as of July 2024
Value of the capital expenditure of Qatar on the FIFA World Cup 2011-2022
Value of the capital expenditure of Qatar on the FIFA World Cup from 2011 to 2022 (in billion U.S. dollars)
Betting intent of adults in England ahead of the World Cup 2022
Share of adults in England that intend to bet on the 2022 FIFA World Cup as of November 2022
Impact of data privacy laws on cookie-based advertising in the U.S. 2024
Impact of data privacy laws on cookie-based advertising in the United States as of July 2024
Tonnage of bombs dropped in attacks on Dresden during WWII 1944-1945
Tonnage of bombs dropped in attacks on Dresden during the Second World War in 1944 and 1945
Market cap of data center REITs in the U.S. 2024
Market capitalization of the leading data center real estate investment trusts (REITs) in the United States as of August 2024 (in billion U.S. dollars)
Cost of a data breach in the United Kingdom (UK) 2020-2024
Average cost of a data breach in the United Kingdom (UK) from 2020 to 2024 (in million U.S. dollars)
Trade balance of goods of the Arab world countries 2023
Arab world countries: Trade balance of goods in 2023, by country (in billion U.S. dollars)
Breakdown of GHG emissions during the Russia-Ukraine war 2022-2024, by region
Geographical distribution of greenhouse gas emissions produced in the first two years of the Russia-Ukraine war from 2022 to 2024
Breakdown of GHG emissions during the Russia-Ukraine war 2022-2024, by sector
Distribution of total greenhouse gas emissions during the Russia-Ukraine war from February 2022 to February 2024, by sector (in million metric tons of carbon dioxide equivalent)
Leading impacts of the Russia-Ukraine war on ASEAN 2023-2024
Leading impacts of the Russia-Ukraine war on Southeast Asia from 2023 to 2024
Leading impacts of the Russia-Ukraine war ASEAN 2024, by country
Leading impacts of the Russia-Ukraine war in Southeast Asia in 2024, by country
World ranking of the Icelandic male national football team 1993-2023
Position of the men's national soccer team from Iceland in the FIFA World Ranking from 1993 to 2023
U.S. impact of not having a Speaker of the House 2023
Americans on how the U.S. House of Representatives not having a Speaker of the House is impacting the government in the United States in 2023
Top earners in World of Warcraft in the Netherlands 2024
Leading eSports players in World of Warcraft (WoW) from the Netherlands as of April 2024, by prize money earned (in 1,000 U.S. dollars)
Average cost per data breach in the United States 2006-2024
Average cost of a data breach in the United States from 2006 to 2024 (in million U.S. dollars)
Number of world records broken at the Summer Olympics 2004-2024
Number of world records broken at the Olympic Summer Games from 2004 to 2024
Countries with the largest number of overseas Chinese 2023
Selected countries with the largest number of overseas Chinese 2023 (in millions)
Leading container ship operators - share of world liner fleet 2024
Leading ship operator's share of the world liner fleet as of April 16, 2024
Economic impact of the Women’s World Cup in New Zealand 2023
Key figures on the economic impact of the FIFA Women’s World Cup in New Zealand in 2023
Distribution of the leading causes of death in Africa in 2021
Distribution of the leading causes of death in Africa in 2021
Russia-Ukraine war impact on the situation of Ukrainian workers in Poland 2024
If your company employs workers from Ukraine, did you report one of the following situations connected with the ongoing war in Ukraine?
U.S. preference of compromise-oriented Speaker of the House 2023, by party
Preference among voters regarding whether the next Speaker of the House of Representatives should be compromise-oriented in the United States in 2023, by political party
Israeli public concern about the geographical expansion of the Israel-Hamas war 2024
Israeli public concern about the geographical expansion of the Israel-Hamas war in 2024
Preferred methods of choice for sharing wearable health data in the U.S. 2023
Share of respondents who would prefer the following methods for sharing wearable health data with doctors in the United States in 2023
Number of large-scale data breaches in the U.S. healthcare industry 2009-2024
Number of healthcare data breaches involving the loss of 500 or more records in the United States from 2009 to 2024 YTD
Number of data centers APAC 2024, by country
Number of data centers in the Asia-Pacific region in 2024, by country or territory
Number of data centers in the Western Balkans 2024, by region
Number of data centers in the Western Balkans in 2024, by region
United States: number of stores of the leading retailers 2023
Number of U.S. stores of leading retailers in the United States in 2023
Breakdown of emissions from the Russia-Ukraine war 2022-2024, by region and sector
Distribution of greenhouse gas emissions produced during the Russia-Ukraine war from 2022 to 2024, by region and sector
Number of data compromises and impacted individuals in U.S. 2005-2023
Annual number of data compromises and individuals impacted in the United States from 2005 to 2023
World ranking of the Danish male national football team 1993-2023
Position of the men's national soccer team from Denmark in the FIFA World Ranking from 1993 to 2023
World ranking of the Swedish male national football team 1992-2023
Position of the men's national soccer team from Sweden in the FIFA World Ranking from 1992 to 2023
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